Powered by Deep Web Technologies
Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

How Energy-Efficient Light Bulbs Compare with Traditional Incandescent...  

Broader source: Energy.gov (indexed) [DOE]

could save you about 50 per year in energy costs when you replace 15 traditional incandescent bulbs in your home. Energy-efficient light bulbs are available today and could save...

2

Free Energy Efficiency Kit includes CFL light bulbs,  

E-Print Network [OSTI]

Free Energy Efficiency Kit Kit includes CFL light bulbs, spray foam, low-flow shower head, and more! Building Science 101 Presentation BPI Certified Building Professionals will present home energy efficiency for discounted energy assessments. FREE HOME ENERGY EFFICIENCY SEMINAR N e w R i ver L i g ht & Pow e r a n d W

Rose, Annkatrin

3

Text-Alternative Version: L Prize™: The Race for Super Efficient Light Bulbs  

Broader source: Energy.gov [DOE]

Below is the text-alternative version of the L Prize™: The Race for Super Efficient Light Bulbs webcast.

4

L Prize™: The Race for Super Efficient Light Bulbs  

Broader source: Energy.gov [DOE]

This September 23, 2008 webcast provided an overview of the Bright Tomorrow Lighting Prize (L Prize) technology competition. The L Prize calls for super-efficient SSL products to replace two of the...

5

600 New Lights Bulbs to Improve Energy Efficiency at DOE | Department...  

Broader source: Energy.gov (indexed) [DOE]

our Washington, D.C., Forrestal North Building canopy with state of the art Light Emitting Diode (LED) fixtures. Every new bulb now uses just 23 watts instead of 205 watts....

6

Waste Toolkit A-Z Light bulbs  

E-Print Network [OSTI]

Waste Toolkit A-Z Light bulbs Can I recycle light bulbs? It depends what type of bulbs you have of in the normal University waste bins (landfill waste). Energy saving bulbs and fluorescent tubes are classified light bulbs? Standard filament bulbs Put in the waste bin (landfill waste) as these are not classified

Melham, Tom

7

Comparing Light Bulbs  

Broader source: Energy.gov [DOE]

In this exercise, students will use a light to demonstrate the difference between being energy-efficient and energy-wasteful, and learn what energy efficiency means.

8

Consumer Light Bulb Changes: Briefing and Resources for Media...  

Energy Savers [EERE]

background information on the new legislation and the types of energy-efficient lighting available today. Consumer Light Bulb Changes: Briefing and Resources for Media and...

9

Changing How You Choose Light Bulbs | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Bulbs July 12, 2010 - 7:30am Addthis Elizabeth Spencer Communicator, National Renewable Energy Laboratory Last month, the Federal Trade Commission announced that light bulbs will...

10

Consumer Light Bulb Changes: Briefing and Resources for Media...  

Broader source: Energy.gov (indexed) [DOE]

flux") - CFL: Compact Fluorescent Lamp: The curly fluorescent bulbs - LED: Light Emitting Diode: more recently emerging technology, also called "solid state lighting" as it is...

11

The Hazards of Use and Disposal of Compact Fluorescent Bulbs Compact fluorescent lights (aka. CFLs) work by exciting a phosphorous coating within the tube to emit  

E-Print Network [OSTI]

The Hazards of Use and Disposal of Compact Fluorescent Bulbs Compact fluorescent lights (aka. CFLs FLUORESCENT BULB? Because there is such a small amount of mercury in CFLs, the greatest hazard exposure the bulb to be an efficient light source. By comparison, older home thermometers contain 500 milligrams

Maroncelli, Mark

12

Labeling energy cost on light bulbs lowers implicit discount rates Jihoon Min a  

E-Print Network [OSTI]

levels that could be achieved if the most energy-efficient and cost-effective end-use technologiesAnalysis Labeling energy cost on light bulbs lowers implicit discount rates Jihoon Min a , Inęs L of five, lowering barriers to adoption of energy efficient alternatives with higher up-front costs

Michalek, Jeremy J.

13

High efficiency incandescent lighting  

DOE Patents [OSTI]

Incandescent lighting structure. The structure includes a thermal emitter that can, but does not have to, include a first photonic crystal on its surface to tailor thermal emission coupled to, in a high-view-factor geometry, a second photonic filter selected to reflect infrared radiation back to the emitter while passing visible light. This structure is highly efficient as compared to standard incandescent light bulbs.

Bermel, Peter; Ilic, Ognjen; Chan, Walker R.; Musabeyoglu, Ahmet; Cukierman, Aviv Ruben; Harradon, Michael Robert; Celanovic, Ivan; Soljacic, Marin

2014-09-02T23:59:59.000Z

14

Westinghouse Pays $50,000 Civil Penalty to Resolve Light Bulb...  

Office of Environmental Management (EM)

of Energy has successfully resolved the enforcement case against Westinghouse Lighting Corporation for failure to certify its light bulbs as compliant with DOE's federal...

15

Tired of changing light bulbs AND want to save money? Still using 100 year-old technology?  

E-Print Network [OSTI]

THE COMPACT FLUORESCENT LIGHT BULB CHALLENGE! · A 23 W Compact bulb gives the same light as a 100W regular with compact fluorescent bulbs! Toss `Em Install `Em Most big stores stock them. We bought ours at Costco @ $2Tired of changing light bulbs AND want to save money? Still using 100 year-old technology? TAKE

Glashausser, Charles

16

How to upgrade your incandescent light bulbs Many people are choosing replacements for their standard incandescent light bulbs to save money or energy, because they've heard of new LED  

E-Print Network [OSTI]

How to upgrade your incandescent light bulbs Many people are choosing replacements for their standard incandescent light bulbs to save money or energy, because they've heard of new LED options, or in anticipation of the phase-out of standard incandescent bulbs in the U.S. starting in 2012. If you've shopped

Bystroff, Chris

17

Lighting a building with a single bulb : toward a system for illumination in the 21st c.; or, A centralized illumination system for the efficient decoupling and recovery of lighting related heat  

E-Print Network [OSTI]

Piping light represents the first tenable method for recovery and reutilization of lighting related heat. It can do this by preserving the energy generated at the lamp as radiative, departing from precedent and avoiding ...

Levens, Kurt Antony, 1961-

1997-01-01T23:59:59.000Z

18

Frequently Asked Questions Information on Compact Fluorescent Light Bulbs (CFLs) and Mercury  

E-Print Network [OSTI]

Frequently Asked Questions Information on Compact Fluorescent Light Bulbs (CFLs) and Mercury emissions equivalent to those of more than 800,000 cars. Do CFLs contain mercury? CFLs contain a very small amount of mercury sealed within the glass tubing ­ an average of 5 milligrams ­ about the amount

Jia, Songtao

19

Why Did the LED Light Bulb Cross the Road?  

Office of Energy Efficiency and Renewable Energy (EERE)

Could using humor as a marketing strategy make energy efficiency a bit more digestible? One Illinois grant recipient thinks it could be.

20

March 10, 2011 Let There Be More Efficient Light  

E-Print Network [OSTI]

standards for light bulbs, which include a phasing out of incandescent bulbs in favor of more energy lyrically with two colleagues about "the incandescent bulb that has been turning back the night ever since

Colorado at Boulder, University of

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Comparison of Test Procedures and Energy Efficiency Criteria in Selected International Standards and Labeling Programs for Clothes Washers, Water Dispensers, Vending Machines and CFLs  

E-Print Network [OSTI]

top_runner//tr_fluorescent_light_bulb_jul.2009.pdf NiskinSubcommittee Final Report (bulb type fluorescent lamp). ”Fluorescent Lamps (CFLs) are an efficient lighting alternative to traditional incandescent light bulbs

Fridley, David

2010-01-01T23:59:59.000Z

22

Randolph EMC- Commercial and Industrial Efficient Lighting Rebate Program (North Carolina)  

Broader source: Energy.gov [DOE]

Commercial and industrial members who upgrade to energy-efficient light bulbs which meet Randolph EMC's standards are eligible for a prescriptive incentive payment. The cooperative will provide a...

23

Resource Use Efficiency Dr. Ernst von Weizscker  

E-Print Network [OSTI]

LEED building #12;Energy efficiency From incandescent light bulbs to solid state lighting #12;Modern make it happen? CAFE standards Building codes Banning incandescent light bulbs Banning water wasting

Keller, Arturo A.

24

What Light Bulbs Do You Use in Your Home? | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Blackout? LED lights are six to seven times more energy efficient than conventional incandescent lights, cut energy use by more than 80 percent and can last more than 25 times...

25

Mercury Lamps Recycling Fluorescent light-tubes, compact fluorescent bulbs, mercury and sodium vapor lamps, ultraviolet and  

E-Print Network [OSTI]

Mercury Lamps Recycling Fluorescent light-tubes, compact fluorescent bulbs, mercury and sodium vapor lamps, ultraviolet and HID (high-intensity discharge) lamps and all other mercury containing labeled for shipment to a recycling plant for mercury, glass and aluminum recovery. The beneficial re

Baker, Chris I.

26

Energy Efficiency Through Lighting Upgrades  

SciTech Connect (OSTI)

Lighting upgrades including neon to LED, incandescent to CFL's and T-12 to T-8 and T-5's were completed through this grant. A total of 16 Chickasaw nation facilities decreased their carbon footprint because of these grant funds. Calculations used were based on comparing the energy usage from the previous year�¢����s average and the current energy usage. For facilities without a full year's set of energy bills, the month after installation was compared to the same month from the previous year. Overall, the effect the lighting change-outs had for the gaming centers and casinos far exceeded expectations. For the Madill Gaming Center; both an interior and exterior upgrade was performed which resulted in a 31% decrease in energy consumption. This same reduction was seen in every facility that participated in the grant. Just by simply changing out light bulbs to newer energy efficient equivalents, a decrease in energy usage can be achieved and this was validated by the return on investment seen at Chickasaw Nation facilities. Along with the technical project tasks were awareness sessions presented at Chickasaw Head Starts. The positive message of environmental stewardship was passed down to head start students and passed along to Chickasaw employees. Excitement was created in those that learned what they could do to help reduce their energy bills and many followed through and took the idea home. For a fairy low cost, the general public can also use this technique to lower their energy consumption both at home and at work. Although the idea behind the project was somewhat simple, true benefits have been gained through environmental awareness and reductions of energy costs.

Kara Berst; Maria Howeth

2010-06-01T23:59:59.000Z

27

Efficiency Maine Residential Lighting Program  

Broader source: Energy.gov [DOE]

Efficiency Maine's Residential Lighting Program works directly with retailers and manufacturers to encourage residential customers to purchase energy-efficient lighting. Rebate amounts average $1...

28

How Energy-Efficient Light Bulbs Compare with Traditional Incandescents |  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May JunDatastreamsmmcrcalgovInstrumentsruc DocumentationP-SeriesFlickr FlickrGuidedCH2MLLC HistoryVeterans | UpdatesHowGetDoes a

29

Overcoming Common Pitfalls: Energy Efficient Lighting Projects...  

Broader source: Energy.gov (indexed) [DOE]

Overcoming Common Pitfalls: Energy Efficient Lighting Projects Overcoming Common Pitfalls: Energy Efficient Lighting Projects Transcript Presentation More Documents & Publications...

30

New Lighting Fixtures: Combining Creativity and Style with Energy Efficiency  

SciTech Connect (OSTI)

This article for a building trade magazine describes a national design competition for energy efficient lighting sponsored by the U.S. Department of Energy, the American Lighting Association, and the Consortium for Energy Efficiency, with winners announced at ALA's Annual Conference May 14, 2004, in Tucson. The Lighting for Tomorrow competition was the first national lighting fixture design competition focusing on energy-efficient residential lighting. The competition invited fixture manufacturers and designers to come up with beautiful, functional lighting fixtures that also happen to be energy efficient. Fixtures were required to use a ''dedicated'' energy-efficient light source, such as a pin-based fluorescent lamp that cannot be replaced with a screw-in incandescent bulb. Fixtures also had to meet a minimum energy efficiency level that eliminated use of incandescent and halogen lamps, leaving the door open only to fluorescent sources and LEDs. More than 150 paper designs were submitted in the first phase of the competition, in 2003. Of those, 24 finalists were invited to submit working prototypes in 2004, and the winners were announced in May. The Grand Prize of $10,000 went to American Fluorescent of Waukegan, Illinois, for its ''Salem'' chandelier. Some winning fixtures are already available through Lowe's Home Improvement Centers.

Gordon, Kelly L.; Foster, Rebecca; McGowan, Terry

2004-10-01T23:59:59.000Z

31

Concord Municipal Light Plant- Commercial Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Concord Municipal Light Plant (CMLP) offers rebates to commercial customers for a variety of appliances, ETS heating systems, general lighting upgrades, CFL bulbs, and exit sign retrofit kits. A...

32

Efficient Light Sources Today  

E-Print Network [OSTI]

This paper reviews new lamp and lighting technology in terms of application and economic impact. Included are the latest advances in High Intensity Discharge systems, energy saving fluorescent lamps and ballasts, and the new state of the art high...

Hart, A. L.

1982-01-01T23:59:59.000Z

33

High Efficiency, Illumination Quality OLEDs for Lighting  

SciTech Connect (OSTI)

The goal of the program was to demonstrate a 45 lumen per watt white light device based upon the use of multiple emission colors through the use of solution processing. This performance level is a dramatic extension of the team's previous 15 LPW large area illumination device. The fundamental material system was based upon commercial polymer materials. The team was largely able to achieve these goals, and was able to deliver to DOE a 90 lumen illumination source that had an average performance of 34 LPW a 1000 cd/m{sup 2} with peak performances near 40LPW. The average color temperature is 3200K and the calculated CRI 85. The device operated at a brightness of approximately 1000cd/m{sup 2}. The use of multiple emission colors particularly red and blue, provided additional degrees of design flexibility in achieving white light, but also required the use of a multilayered structure to separate the different recombination zones and prevent interconversion of blue emission to red emission. The use of commercial materials had the advantage that improvements by the chemical manufacturers in charge transport efficiency, operating life and material purity could be rapidly incorporated without the expenditure of additional effort. The program was designed to take maximum advantage of the known characteristics of these material and proceeded in seven steps. (1) Identify the most promising materials, (2) assemble them into multi-layer structures to control excitation and transport within the OLED, (3) identify materials development needs that would optimize performance within multilayer structures, (4) build a prototype that demonstrates the potential entitlement of the novel multilayer OLED architecture (5) integrate all of the developments to find the single best materials set to implement the novel multilayer architecture, (6) further optimize the best materials set, (7) make a large area high illumination quality white OLED. A photo of the final deliverable is shown. In 2003, a large area, OLED based illumination source was demonstrated that could provide light with a quality, quantity, and efficiency on par with what can be achieved with traditional light sources. The demonstration source was made by tiling together 16 separate 6-inch x 6-inch blue-emitting OLEDs. The efficiency, total lumen output, and lifetime of the OLED based illumination source were the same as what would be achieved with an 80 watt incandescent bulb. The devices had an average efficacy of 15 LPW and used solution-processed OLEDs. The individual 6-inch x 6-inch devices incorporated three technology strategies developed specifically for OLED lighting -- downconversion for white light generation, scattering for outcoupling efficiency enhancement, and a scalable monolithic series architecture to enable large area devices. The downconversion approach consists of optically coupling a blue-emitting OLED to a set of luminescent layers. The layers are chosen to absorb the blue OLED emission and then luminescence with high efficiency at longer wavelengths. The composition and number of layers are chosen so that the unabsorbed blue emission and the longer wavelength re-emission combine to make white light. A downconversion approach has the advantage of allowing a wide variety of colors to be made from a limited set of blue emitters. In addition, one does not have to carefully tune the emission wavelength of the individual electro-luminescent species within the OLED device in order to achieve white light. The downconversion architecture used to develop the 15LPW large area light source consisted of a polymer-based blue-emitting OLED and three downconversion layers. Two of the layers utilized perylene based dyes from BASF AG of Germany with high quantum efficiency (>98%) and one of the layers consisted of inorganic phosphor particles (Y(Gd)AG:Ce) with a quantum efficiency of {approx}85%. By independently varying the optical density of the downconversion layers, the overall emission spectrum could be adjusted to maximize performance for lighting (e.g. blackbody temp

Joseph Shiang; James Cella; Kelly Chichak; Anil Duggal; Kevin Janora; Chris Heller; Gautam Parthasarathy; Jeffery Youmans; Joseph Shiang

2008-03-31T23:59:59.000Z

34

Pupillary efficient lighting system  

DOE Patents [OSTI]

A lighting system having at least two independent lighting subsystems each with a different ratio of scotopic illumination to photopic illumination. The radiant energy in the visible region of the spectrum of the lighting subsystems can be adjusted relative to each other so that the total scotopic illumination of the combined system and the total photopic illumination of the combined system can be varied independently. The dilation or contraction of the pupil of an eye is controlled by the level of scotopic illumination and because the scotopic and photopic illumination can be separately controlled, the system allows the pupil size to be varied independently of the level of photopic illumination. Hence, the vision process can be improved for a given level of photopic illumination.

Berman, Samuel M. (San Francisco, CA); Jewett, Don L. (Mill Valley, CA)

1991-01-01T23:59:59.000Z

35

Columbia Water and Light- HVAC and Lighting Efficiency Rebates  

Broader source: Energy.gov [DOE]

Columbia Water and Light (CWL) offers rebates to its commercial and industrial customers for the purchase of high efficiency HVAC installations and efficient lighting. Incentives for certain...

36

THELUMINAPROJECT http://light.lbl.gov  

E-Print Network [OSTI]

source of portable lighting in Kenya, outpacing incandescent flashlights (Johnstone et al., 2009). LED technology has the potential to provide efficiency and performance benefits relative to incandescent bulbs

Jacobson, Arne

37

GREEN LIVING Replace incandencent and halogen light bulbs with LED and CLFs  

E-Print Network [OSTI]

GREEN LIVING GUIDE ENERGY TRAVEL FOOD sustain yosef WATER Replace incandencent and halogen light for your laundry RESIST THAT SWITCH! Use natural light during the day, and no lights when you are gone USE MORE THAN YOU CAN EAT, reduce your waste stream DRINK FAIR TRADE COFFEE - Check out Conrad

Thaxton, Christopher S.

38

DOE Requires Westinghouse to Cease Sales of Two Light Bulb Models...  

Broader source: Energy.gov (indexed) [DOE]

and Fuzhou Sunlight Lighting Electrical Appliance Company to allow the companies to resume sales of an incandescent reflector lamp basic model 50PAR30F (Westinghouse product...

39

Sleep, mood, and circadian responses to bright green light during sleep  

E-Print Network [OSTI]

white light from fluorescent bulbs, as point sources mightthan incandescent bulbs. Also, fluorescent light is easier

Grandner, Michael Andrew

2007-01-01T23:59:59.000Z

40

Highly Efficient Silicon Light Emitting Diode  

E-Print Network [OSTI]

silicon light-emitting diodes (LED) that efficiently emit photons with energy around the silicon bandgap

Leminh Holleman Wallinga; P. Leminh; J. Holleman; H. Wallinga

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Randolph EMC- Agricultural Efficient Lighting Rebate Program (North Carolina)  

Broader source: Energy.gov [DOE]

Agricultural members of Randolph EMC (REMC) who upgrade to energy-efficient CFL bulbs in agricultural facilities are eligible for an incentive to help cover the initial cost of installation. The...

42

Peninsula Light Company- Commercial Efficient Lighting Rebate Program  

Broader source: Energy.gov [DOE]

Peninsula Light Company (PLC) offers a rebate program for commercial customers who wish to upgrade to energy efficient lighting. Participating customers must be served by PLC commercial service....

43

Light Duty Efficient, Clean Combustion  

SciTech Connect (OSTI)

Cummins has successfully completed the Light Duty Efficient Clean Combustion (LDECC) cooperative program with DoE. This program was established in 2007 in support of the Department of Energy's Vehicles Technologies Advanced Combustion and Emissions Control initiative to remove critical barriers to the commercialization of advanced, high efficiency, emissions compliant internal combustion (IC) engines for light duty vehicles. Work in this area expanded the fundamental knowledge of engine combustion to new regimes and advanced the knowledge of fuel requirements for these diesel engines to realize their full potential. All of the following objectives were met with fuel efficiency improvement targets exceeded: (1) Improve light duty vehicle (5000 lb. test weight) fuel efficiency by 10.5% over today's state-of-the-art diesel engine on the FTP city drive cycle; (2) Develop and design an advanced combustion system plus aftertreatment system that synergistically meets Tier 2 Bin 5 NOx and PM emissions standards while demonstrating the efficiency improvements; (3) Maintain power density comparable to that of current conventional engines for the applicable vehicle class; and (4) Evaluate different fuel components and ensure combustion system compatibility with commercially available biofuels. Key accomplishments include: (1) A 25% improvement in fuel efficiency was achieved with the advanced LDECC engine equipped with a novel SCR aftertreatment system compared to the 10.5% target; (2) An 11% improvement in fuel efficiency was achieved with the advanced LDECC engine and no NOx aftertreamtent system; (3) Tier 2 Bin 5 and SFTP II emissions regulations were met with the advanced LDECC engine equipped with a novel SCR aftertreatment system; (4) Tier 2 Bin 5 emissions regulations were met with the advanced LDECC engine and no NOx aftertreatment, but SFTP II emissions regulations were not met for the US06 test cycle - Additional technical barriers exist for the no NOx aftertreatment engine; (5) Emissions and efficiency targets were reached with the use of biodiesel. A variety of biofuel feedstocks (soy, rapeseed, etc.) was investigated; (6) The advanced LDECC engine with low temperature combustion was compatible with commercially available biofuels as evaluated by engine performance testing and not durability testing; (7) The advanced LDECC engine equipped with a novel SCR aftertreatment system is the engine system architecture that is being further developed by the Cummins product development organization. Cost reduction and system robustness activities have been identified for future deployment; (8) The new engine and aftertreatment component technologies are being developed by the Cummins Component Business units (e.g. fuel system, turbomachinery, aftertreatment, electronics, etc.) to ensure commercial viability and deployment; (9) Cummins has demonstrated that the technologies developed for this program are scalable across the complete light duty engine product offerings (2.8L to 6.7L engines); and (10) Key subsystems developed include - sequential two stage turbo, combustions system for low temperature combustion, novel SCR aftertreatment system with feedback control, and high pressure common rail fuel system. An important element of the success of this project was leveraging Cummins engine component technologies. Innovation in component technology coupled with system integration is enabling Cummins to move forward with the development of high efficiency clean diesel products with a long term goal of reaching a 40% improvement in thermal efficiency for the engine plus aftertreatment system. The 40% improvement is in-line with the current light duty vehicle efficiency targets set by the 2010 DoE Vehicle Technologies MYPP and supported through co-operative projects such as the Cummins Advanced Technology Powertrains for Light-Duty Vehicles (ATP-LD) started in 2010.

Donald Stanton

2010-12-31T23:59:59.000Z

44

Light Duty Efficient, Clean Combustion  

SciTech Connect (OSTI)

Cummins has successfully completed the Light Duty Efficient Clean Combustion (LDECC) cooperative program with DoE. This program was established in 2007 in support of the Department of Energy’s Vehicles Technologies Advanced Combustion and Emissions Control initiative to remove critical barriers to the commercialization of advanced, high efficiency, emissions compliant internal combustion (IC) engines for light duty vehicles. Work in this area expanded the fundamental knowledge of engine combustion to new regimes and advanced the knowledge of fuel requirements for these diesel engines to realize their full potential. All of the following objectives were met with fuel efficiency improvement targets exceeded: 1. Improve light duty vehicle (5000 lb. test weight) fuel efficiency by 10.5% over today’s state-ofthe- art diesel engine on the FTP city drive cycle 2. Develop & design an advanced combustion system plus aftertreatment system that synergistically meets Tier 2 Bin 5 NOx and PM emissions standards while demonstrating the efficiency improvements. 3. Maintain power density comparable to that of current conventional engines for the applicable vehicle class. 4. Evaluate different fuel components and ensure combustion system compatibility with commercially available biofuels. Key accomplishments include: ? A 25% improvement in fuel efficiency was achieved with the advanced LDECC engine equipped with a novel SCR aftertreatment system compared to the 10.5% target ? An 11% improvement in fuel efficiency was achieved with the advanced LDECC engine and no NOx aftertreamtent system ? Tier 2 Bin 5 and SFTP II emissions regulations were met with the advanced LDECC engine equipped with a novel SCR aftertreatment system ? Tier 2 Bin 5 emissions regulations were met with the advanced LDECC engine and no NOx aftertreatment, but SFTP II emissions regulations were not met for the US06 test cycle – Additional technical barriers exist for the no NOx aftertreatment engine ? Emissions and efficiency targets were reached with the use of biodiesel. A variety of biofuel feedstocks (soy, rapeseed, etc.) was investigated. ? The advanced LDECC engine with low temperature combustion was compatible with commercially available biofuels as evaluated by engine performance testing and not durability testing. ? The advanced LDECC engine equipped with a novel SCR aftertreatment system is the engine system architecture that is being further developed by the Cummins product development organization. Cost reduction and system robustness activities have been identified for future deployment. ? The new engine and aftertreatment component technologies are being developed by the Cummins Component Business units (e.g. fuel system, turbomachinery, aftertreatment, electronics, etc.) to ensure commercial viability and deployment ? Cummins has demonstrated that the technologies developed for this program are scalable across the complete light duty engine product offerings (2.8L to 6.7L engines) ? Key subsystems developed include – sequential two stage turbo, combustions system for low temperature combustion, novel SCR aftertreatment system with feedback control, and high pressure common rail fuel system An important element of the success of this project was leveraging Cummins engine component technologies. Innovation in component technology coupled with system integration is enabling Cummins to move forward with the development of high efficiency clean diesel products with a long term goal of reaching a 40% improvement in thermal efficiency for the engine plus aftertreatment system. The 40% improvement is in-line with the current light duty vehicle efficiency targets set by the 2010 DoE Vehicle Technologies MYPP and supported through co-operative projects such as the Cummins Advanced Technology Powertrains for Light- Duty Vehicles (ATP-LD) started in 2010.

Stanton, Donald W

2011-06-03T23:59:59.000Z

45

Lamp bulb with integral reflector  

DOE Patents [OSTI]

An improved electrodeless discharge lamp bulb includes an integral ceramic reflector as a portion of the bulb envelope. The bulb envelope further includes two pieces, a reflector portion or segment is cast quartz ceramic and a light transmissive portion is a clear fused silica. In one embodiment, the cast quartz ceramic segment includes heat sink fins or stubs providing an increased outside surface area to dissipate internal heat. In another embodiment, the quartz ceramic segment includes an outside surface fused to eliminate gas permeation by polishing.

Levin, Izrail (Silver Spring, MD); Shanks, Bruce (Gaithersburg, MD); Sumner, Thomas L. (Wheaton, MD)

2001-01-01T23:59:59.000Z

46

Anoka Municipal Utility- Residential Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Anoka Municipal Utilities (AMU) offers incentives for residential customers to install energy-efficient appliances and light bulbs in eligible homes. Rebates are available for Energy Star qualified...

47

Legislative Directive: EISA 2007, Subtitle B: Lighting Energy Efficiency  

Broader source: Energy.gov [DOE]

Legislative Directive: EISA 2007, Subtitle B: Lighting Energy Efficiency, Sec. 321: Lighting Energy Efficiency

48

Estimate of federal relighting potential and demand for efficient lighting products  

SciTech Connect (OSTI)

The increasing level of electric utility rebates for energy-efficient lighting retrofits has recently prompted concern over the adequacy of the market supply of energy-efficient lighting products (Energy User News 1991). In support of the U.S. Department of Energy`s Federal Energy Management Program, Pacific Northwest Laboratory (PNL) has developed an estimate of the total potential for energy-efficient lighting retrofits in federally owned buildings. This estimate can be used to address the issue of the impact of federal relighting projects on the supply of energy-efficient lighting products. The estimate was developed in 1992, using 1991 data. Any investments in energy-efficient lighting products that occurred in 1992 will reduce the potential estimated here. This analysis proceeds by estimating the existing stock of lighting fixtures in federally owned buildings. The lighting technology screening matrix is then used to determine the minimum life-cycle cost retrofit for each type of existing lighting fixture. Estimates of the existing stock are developed for (1) four types of fluorescent lighting fixtures (2-, 3-, and 4-lamp, F40 4-foot fixtures, and 2-lamp, F96 8-foot fixtures, all with standard magnetic ballasts); (2) one type of incandescent fixture (a 75-watt single bulb fixture); and (3) one type of exit sign (containing two 20-watt incandescent bulbs). Estimates of the existing stock of lighting fixtures in federally owned buildings, estimates of the total potential demand for energy-efficient lighting products if all cost-effective retrofits were undertaken immediately, and total potential annual energy savings (in MWh and dollars), the total investment required to obtain the energy savings and the present value of the efficiency investment, are presented.

Shankle, S.A.; Dirks, J.A.; Elliott, D.B.; Richman, E.E.; Grover, S.E.

1993-11-01T23:59:59.000Z

49

Analysis of Minimum Efficiency Performance Standards for Residential General Service Lighting in Chile  

E-Print Network [OSTI]

phasing out the use of incandescent lamps. Following majorproposed phase out of incandescent bulbs in Chile. 2 Lifeless energy: here incandescent lights (IL) are evaluated

Letschert, Virginie E.

2012-01-01T23:59:59.000Z

50

Delivering Energy Efficiency to Middle Income Single Family Households  

E-Print Network [OSTI]

system CFL – Compact Fluorescent Light Bulb IAQ – Indoor Airdiscount compact fluorescent light bulbs (CFLs) or providediscount compact fluorescent light bulbs (CFLs) or provide

Zimring, Mark

2012-01-01T23:59:59.000Z

51

Technology Development for Light Duty High Efficient Diesel Engines...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Light Duty High Efficient Diesel Engines Technology Development for Light Duty High Efficient Diesel Engines Improve the efficiency of diesel engines for light duty applications...

52

Article #11, May 23, 2006 AJ's Technical Tips: Technologies for Lighting in Rural Africa  

E-Print Network [OSTI]

/a 30 lumens 0.1 Incandescent Bulb 15 W 225 lumens 15 Fluorescent Tube Lamp 10 W 500 lumens 50 White LED Lamp 1 W 30 lumens 30 The data in Table 1 show that incandescent bulbs and fluorescent tubes generate incandescent bulbs are about 150 times more efficient. In other words, electric lights are not only brighter

Jacobson, Arne

53

Efficient Driver for Dimmable White LED Lighting.  

E-Print Network [OSTI]

??A high efficiency driver circuit is proposed for Light Emitting Diode (LED) lamps with dimming feature. The current regulation is accomplished by processing partial power… (more)

Yang, Wen-ching

2011-01-01T23:59:59.000Z

54

Maximizing Light Utilization Efficiency and Hydrogen Production...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

in Microalgal Cultures, DOE Hydrogen Program FY 2010 Annual Progress Report Maximizing Light Utilization Efficiency and Hydrogen Production in Microalgal Cultures, DOE Hydrogen...

55

Zinc Oxide and Nitride Nanowire Based Light Emitting Diodes  

E-Print Network [OSTI]

of incandescent light bulb, fluorescent lamp, and blue lightof incandescent light bulb, fluorescent lamp, and blue lightincandescent bulb and is on the same order as fluorescent

Lai, Elaine Michelle

2009-01-01T23:59:59.000Z

56

LEDs for Energy Efficient Greenhouse Lighting  

E-Print Network [OSTI]

Light energy is an important factor for plant growth. In regions where the natural light source, i.e. solar radiation, is not sufficient for growth optimization, additional light sources are being used. Traditional light sources such as high pressure sodium lamps and other metal halide lamps are not very efficient and generate high radiant heat. Therefore, new sustainable solutions should be developed for energy efficient greenhouse lighting. Recent developments in the field of light source technologies have opened up new perspectives for sustainable and highly efficient light sources in the form of light-emitting diodes, i.e. LEDs, for greenhouse lighting. This review focuses on the potential of LEDs to replace traditional light sources in the greenhouse. In a comparative economic analysis of traditional vs. LED lighting, we show that the introduction of LEDs allows reduction of the production cost of vegetables in the long-run of several years, due to the high energy efficiency, low maintenance cost and lon...

Singh, Devesh; Meinhardt-Wollweber, Merve; Roth, Bernhard

2014-01-01T23:59:59.000Z

57

Westinghouse Pays $50,000 Civil Penalty to Resolve Light Bulb Efficiency  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of EnergyEnergyENERGYWomen Owned SmallOf TheViolations | Department of Energy Westinghouse Pays $50,000

58

Buying the Perfect Energy-Efficient Light Bulb in 5 Easy Steps | Department  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in Review: Top FiveDepartment of Energy BuildingsBuried andSoft CostsBuy AmericanBuying

59

Assessing the residential lighting efficiency opportunities in Guadalajara and Monterrey, Mexico  

SciTech Connect (OSTI)

Lighting, primarily with incandescent bulbs, is the major end use of electricity in Mexican homes. The introduction of compact fluorescent lamps (CFLs) could significantly reduce electricity use in lighting. We describe a survey of lighting use in homes of Guadalajara and Monterrey, Mexico, that was conducted to provide information to determine the potential for CDLs. The results show that 1/6 of the incandescent bulbs can be replaced with CFLs if only those bulbs used more than 4 hours per day are targeted. We also provide insights on conducting similar surveys in other developing countries.

Friedmann,R.; DeBuen,O; Sathaye,J.; Gadgil,A.; Saucedo,R.; Rodriguez,G.

1995-02-02T23:59:59.000Z

60

Jacketed lamp bulb envelope  

DOE Patents [OSTI]

A jacketed lamp bulb envelope includes a ceramic cup having an open end and a partially closed end, the partially closed end defining an aperture, a lamp bulb positioned inside the ceramic cup abutting the aperture, and a reflective ceramic material at least partially covering a portion of the bulb not abutting the aperture. The reflective ceramic material may substantially fill an interior volume of the ceramic cup not occupied by the bulb. The ceramic cup may include a structural feature for aiding in alignment of the jacketed lamp bulb envelope in a lamp. The ceramic cup may include an external flange about a periphery thereof. One example of a jacketed lamp bulb envelope includes a ceramic cup having an open end and a closed end, a ceramic washer covering the open end of the ceramic cup, the washer defining an aperture therethrough, a lamp bulb positioned inside the ceramic cup abutting the aperture, and a reflective ceramic material filling an interior volume of the ceramic cup not occupied by the bulb. A method of packing a jacketed lamp bulb envelope of the type comprising a ceramic cup with a lamp bulb disposed therein includes the steps of filling the ceramic cup with a flowable slurry of reflective material, and applying centrifugal force to the cup to pack the reflective material therein.

MacLennan, Donald A. (Gaithersburg, MD); Turner, Brian P. (Damascus, MD); Gitsevich, Aleksandr (Gaithersburg, MD); Bass, Gary K. (Mt. Airy, MD); Dolan, James T. (Frederick, MD); Kipling, Kent (Gaithersburg, MD); Kirkpatrick, Douglas A. (Great Falls, VA); Leng, Yongzhang (Damascus, MD); Levin, Izrail (Silver Spring, MD); Roy, Robert J. (Frederick, MD); Shanks, Bruce (Gaithersburg, MD); Smith, Malcolm (Alexandria, VA); Trimble, William C. (Columbia, MD); Tsai, Peter (Olney, MD)

2001-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

How Do You Light Your Home Efficiently? | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

using task lighting, flipping the switch, and taking advantage of natural daylight can all help you save on your lighting costs. How do you light your home efficiently?...

62

Reducing home lighting expenses  

SciTech Connect (OSTI)

Ways to reduce lighting expenses are summarized. These include: turning off lights when not in use; keeping fixtures and lamps clean; replacing lamps with more efficient types; using three-way bulbs; use of daylighting; buying fewer lamps and reducing lamp wattage; consider repainting rooms; replacing recessed fixtures with tracklighting; and using efficient lamps for outdoor use. (MCW)

Aimone, M.A.

1981-02-01T23:59:59.000Z

63

Lighting Efficiency Case Study 5 Buildings at  

E-Print Network [OSTI]

Universities ­ DCU, UCD, Trinity College & DIT - "To reduce carbon emissions in our buildings by 10% by 2010Lighting Efficiency Case Study 5 Buildings at Dublin City University Glasnevin, Dublin 9 Works Carried out October ­ December 2009 Project Partially Funded by Sustainable Energy Ireland (SEI) ­ SEEEP

Humphrys, Mark

64

Recessed light fixtures: Infiltration energy loss  

SciTech Connect (OSTI)

This article reports that a recent study revealed that fluorescent bulbs can reduce convective energy losses by 15--65% as compared to incandescent bulbs. Recessed light fixtures are commonly installed in offices and homes. However, a problem arises in homes when the fixtures are set in the ceiling such that the top of the light fixture is exposed to the unconditioned air in the attic. Because some air flow is necessary around the light to avoid overheating, the manufacturers do not make all the fixtures leak tight, only those that are rated for lower wattage bulbs. The need for cooling the fixture may conflict with some building efficiency codes.

Bennett, S.M.; Perez-Blanco, H. (Pennsylvania State Univ., University Park, PA (United States))

1994-06-01T23:59:59.000Z

65

Cedarburg Light and Water Utility- Commercial Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Cedarburg Light and Water Utility provides incentives for commercial, industrial and agricultural customers to increase the energy efficiency of eligible facilities. Upon request, Cedarburg Light...

66

Max Tech and Beyond: Maximizing Appliance and Equipment Efficiency by Design  

E-Print Network [OSTI]

for the motor (30 W). Fluorescent bulbs gain 75% efficiencyreplaced with compact fluorescent bulbs, with LEDs being aCommission compact fluorescent light bulb cubic feet per

Desroches, Louis-Benoit

2012-01-01T23:59:59.000Z

67

Spatial assessment of net mercury emissions from the use of fluorescent bulbs  

SciTech Connect (OSTI)

While fluorescent lighting is an important technology for reducing electrical energy demand, mercury used in the bulbs is an ongoing concern. Using state and country level data, net emissions of mercury from the marginal use of fluorescent lightbulbs are examined for a base year of 2004 for each of the 50 United States and 130 countries. Combustion of coal for electric power generation is generally the largest source of atmospheric mercury pollution; reduction in electricity demand from the substitution of incandescent bulbs with fluorescents leads to reduced mercury emissions during the use of the bulb. This analysis considers the local mix of power sources, coal quality, thermal conversion efficiencies, distribution losses, and any mercury control technologies that might be in place. Emissions of mercury from production and end-of-life treatment of the bulbs are also considered, providing a life-cycle perspective. Net reductions in mercury over the entire life cycle range from -1.2 to 97 mg per bulb depending on the country. The consequences for atmospheric mercury emissions of several policy scenarios are also discussed. 46 refs., 4 figs., 3 tabs.

Matthew J. Eckelman; Paul T. Anastas; Julie B. Zimmerman [Yale University, New Haven, CT (United States). Department of Chemical Engineering

2008-11-15T23:59:59.000Z

68

Richland Energy Services- Energy Efficient Commercial Lighting Program  

Broader source: Energy.gov [DOE]

The City of Richland (COR) provides rebates to encourage commercial utility customers to increase the energy efficiency of facilities by replacing existing lighting systems with more efficient...

69

How Energy Efficiency is "Lighting Up" the Streets of Philadelphia...  

Broader source: Energy.gov (indexed) [DOE]

How Energy Efficiency is "Lighting Up" the Streets of Philadelphia How Energy Efficiency is "Lighting Up" the Streets of Philadelphia April 6, 2011 - 11:01am Addthis Andy Oare Andy...

70

Virginia Tech Shines Light on Home Efficiency | Department of...  

Broader source: Energy.gov (indexed) [DOE]

Virginia Tech Shines Light on Home Efficiency Virginia Tech Shines Light on Home Efficiency July 9, 2010 - 10:54am Addthis Virginia Tech's solar-powered Lumenhaus was designed for...

71

NEXT GENERATION ENERGY EFFICIENT FLUORESCENT LIGHTING PRODUCT  

SciTech Connect (OSTI)

This is the Final Report of the Next-Generation Energy Efficient Fluorescent Lighting Products program, Department of Energy (DOE). The overall goal of this three-year program was to develop novel phosphors to improve the color rendition and efficiency of compact and linear fluorescent lamps. The prime technical approach was the development of quantum-splitting phosphor (QSP) to further increase the efficiency of conventional linear fluorescent lamps and the development of new high color rendering phosphor blends for compact fluorescent lamps (CFLs) as potential replacements for the energy-hungry and short-lived incandescent lamps in market segments that demand high color rendering light sources. We determined early in the project that the previously developed oxide QSP, SrAl{sub 12}O{sub 19}:Pr{sup 3+}, did not exhibit an quantum efficiency higher than unity under excitation by 185 nm radiation, and we therefore worked to determine the physical reasons for this observation. From our investigations we concluded that the achievement of quantum efficiency exceeding unity in SrAl{sub 12}O{sub 19}:Pr{sup 3+} was not possible due to interaction of the Pr{sup 3+} 5d level with the conduction band of the solid. The interaction which gives rise to an additional nonradiative decay path for the excitation energy is responsible for the low quantum efficiency of the phosphor. Our work has led to the development of a novel spectroscopic method for determining photoionzation threshold of luminescent centers in solids. This has resulted in further quantification of the requirements for host phosphor lattice materials to optimize quantum efficiency. Because of the low quantum efficiency of the QSP, we were unable to demonstrate a linear fluorescent lamp with overall performance exceeding that of existing mercury-based fluorescent lamps. Our work on the high color rendering CFLs has been very successful. We have demonstrated CFLs that satisfies the EnergyStar requirement with color rendering index (CRI) greater than 90; the CRI of current commercial CFLs are in the low 80s. In this report we summarize the technical work completed under the Program, summarize our findings about the performance limits of the various technologies we investigated, and outline promising paths for future work.

Alok Srivastava; Anant Setlur

2003-04-01T23:59:59.000Z

72

Energy-efficient lighting for kitchens and bathrooms  

SciTech Connect (OSTI)

This booklet intended for the consumer explains ways to make kitchen and bathroom lighting more energy efficient.

Baker, W.S.

1993-05-01T23:59:59.000Z

73

Highly Efficient Silicon Light Emitting Diode  

E-Print Network [OSTI]

In this paper, we describe the fabrication, using standard silicon processing techniques, of silicon light-emitting diodes (LED) that efficiently emit photons with energy around the silicon bandgap. The improved efficiency had been explained by the spatial confinement of charge carriers due to a local strain field that is formed by dislocation loop arrays. The dependence of device electroluminescent properties on the annealing conditions is carefully examined as a high temperature process has profound influence on these dislocations. Increased luminescent intensity at higher device temperature, together with pure diffusion current conduction mechanism evidently shows the influence of the dislocation loops. The electrical properties of the diode are reasonable with low leakage reverse current.

Leminh Holleman Wallinga; P. Leminh; J. Holleman; H. Wallinga

2000-01-01T23:59:59.000Z

74

Energy Efficiency and Conservation Block Grant Program  

Broader source: Energy.gov (indexed) [DOE]

approximately 277 conventional60-watt light bulbs in tribal homes with 13-watt Light Emitting Diode (LED) bulbs; * Replacement of approximately 18 40-watt conventional fluorescent...

75

Analysis of Minimum Efficiency Performance Standards for Residential General Service Lighting in Chile  

SciTech Connect (OSTI)

Minimum Efficiency Performance Standards (MEPS) have been chosen as part of Chile's national energy efficiency action plan. As a first MEPS, the Ministry of Energy has decided to focus on a regulation for lighting that would ban the sale of inefficient bulbs, effectively phasing out the use of incandescent lamps. Following major economies such as the US (EISA, 2007) , the EU (Ecodesign, 2009) and Australia (AS/NZS, 2008) who planned a phase out based on minimum efficacy requirements, the Ministry of Energy has undertaken the impact analysis of a MEPS on the residential lighting sector. Fundacion Chile (FC) and Lawrence Berkeley National Laboratory (LBNL) collaborated with the Ministry of Energy and the National Energy Efficiency Program (Programa Pais de Eficiencia Energetica, or PPEE) in order to produce a techno-economic analysis of this future policy measure. LBNL has developed for CLASP (CLASP, 2007) a spreadsheet tool called the Policy Analysis Modeling System (PAMS) that allows for evaluation of costs and benefits at the consumer level but also a wide range of impacts at the national level, such as energy savings, net present value of savings, greenhouse gas (CO2) emission reductions and avoided capacity generation due to a specific policy. Because historically Chile has followed European schemes in energy efficiency programs (test procedures, labelling program definitions), we take the Ecodesign commission regulation No 244/2009 as a starting point when defining our phase out program, which means a tiered phase out based on minimum efficacy per lumen category. The following data were collected in order to perform the techno-economic analysis: (1) Retail prices, efficiency and wattage category in the current market, (2) Usage data (hours of lamp use per day), and (3) Stock data, penetration of efficient lamps in the market. Using these data, PAMS calculates the costs and benefits of efficiency standards from two distinct but related perspectives: (1) The Life-Cycle Cost (LCC) calculation examines costs and benefits from the perspective of the individual household; and (2) The National Perspective projects the total national costs and benefits including both financial benefits, and energy savings and environmental benefits. The national perspective calculations are called the National Energy Savings (NES) and the Net Present Value (NPV) calculations. PAMS also calculate total emission mitigation and avoided generation capacity. This paper describes the data and methodology used in PAMS and presents the results of the proposed phase out of incandescent bulbs in Chile.

Letschert, Virginie E.; McNeil, Michael A.; Leiva Ibanez, Francisco Humberto; Ruiz, Ana Maria; Pavon, Mariana; Hall, Stephen

2011-06-01T23:59:59.000Z

76

Zinc Oxide and Nitride Nanowire Based Light Emitting Diodes  

E-Print Network [OSTI]

only be able to find incandescent lightbulbs and fluorescent10: Output spectra of incandescent light bulb, fluorescentemission spectra. The incandescent light bulb for example

Lai, Elaine Michelle

2009-01-01T23:59:59.000Z

77

Chicopee Electric Light- Commercial Energy Efficiency Rebate Program (Massachusetts)  

Broader source: Energy.gov [DOE]

Chicopee Electric Light (CEL) offers a Pilot Energy Efficiency Program to encourage non-residential, commercial, and industrial facilities to pursue energy saving measures and install energy...

78

Florida Power and Light- Residential Energy Efficiency Program  

Broader source: Energy.gov [DOE]

Florida Power and Light (FPL) offers rebates to residential customers who implement certain energy efficiency improvements in eligible homes. HVAC rebates are available for the replacement of air...

79

Peninsula Light Company- Residential Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Peninsula Light Company offers a rebate program for residential customers who want to install energy efficient products in homes. Rebates are provided for window replacements, water heaters, heat...

80

Cape Light Compact- Residential Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Cape Light Compact (CLC) offers a variety of financial incentives to customers for purchasing energy efficient residential equipment. Residential customers can take advantage of incentives on...

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Dayton Power and Light- Residential Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Dayton Power and Light offers rebates to residential customers who purchase and install energy efficient products for the home. Eligible systems and measures include heat pumps, air conditioning...

82

City Water Light and Power- Residential Energy Efficiency Rebate Programs  

Broader source: Energy.gov [DOE]

City Water Light and Power (CWLP) offers rebates to Springfield residential customers for increasing the energy efficiency of participating homes. Rebates are available for geothermal heat pumps,...

83

Independence Power and Light- Residential Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Independence Power and Light (IPL) offers rebates to residential customers for purchasing new, energy efficient appliances. Rebates are available on central air conditioning systems, heat pumps,...

84

City Water Light and Power- Commercial Energy Efficiency Rebate Programs  

Broader source: Energy.gov [DOE]

City Water Light and Power (CWLP) offers rebates to help commercial customers increase the energy efficiency of participating facilities. Energy efficient air-to-air, geothermal and water-loop...

85

South River EMC- Business Energy Efficient Lighting Rebate Program  

Broader source: Energy.gov [DOE]

South River EMC (SREMC) offers a rebate to eligible business customers who wish to upgrade the energy efficiency of lighting systems. The business must upgrade from an older, less efficient system...

86

High-Efficiency Nitride-Based Photonic Crystal Light Sources  

Broader source: Energy.gov [DOE]

The University of California Santa Barbara (UCSB) is maximizing the efficiency of a white LED by enhancing the external quantum efficiency using photonic crystals to extract light that would normally be confined in a conventional structure. Ultimate efficiency can only be achieved by looking at the internal structure of light. To do this, UCSB is focusing on maximizing the light extraction efficiency and total light output from light engines driven by Gallium Nitride (GaN)-based LEDs. The challenge is to engineer large overlap (interaction) between modes and photonic crystals. The project is focused on achieving high extraction efficiency in LEDs, controlled directionality of emitted light, integrated design of vertical device structure, and nanoscale patterning of lateral structure.

87

Overcoming Common Pitfalls: Energy Efficient Lighting Projects...  

Broader source: Energy.gov (indexed) [DOE]

I could talk for days about solid stat lighting, so I'll try not to drive you two nuts. Solid state lightening has three subsets, OLEDs, organic light emitting diodes and quantum...

88

Energy-efficient lighting system for television  

DOE Patents [OSTI]

A light control system for a television camera comprises an artificial light control system which is cooperative with an iris control system. This artificial light control system adjusts the power to lamps illuminating the camera viewing area to provide only sufficient artificial illumination necessary to provide a sufficient video signal when the camera iris is substantially open.

Cawthorne, Duane C. (Amarillo, TX)

1987-07-21T23:59:59.000Z

89

High Efficiency Organic Light Emitting Devices for Lighting  

SciTech Connect (OSTI)

Incorporate internal scattering layers and microlens arrays in high efficiency OLED to achieve up to 70% EQE.

So, Franky; Tansu, Nelson; Gilchrist, James

2013-06-30T23:59:59.000Z

90

Solar cell efficiency enhancement via light trapping in printable resonant  

E-Print Network [OSTI]

Solar cell efficiency enhancement via light trapping in printable resonant dielectric nanosphere for addressing the key challenge of light trapping in thin-film solar cells. We experimentally and theoretically the absorber, junction, and passivation layers. Recently, a number of innovative solar cell light

Atwater, Harry

91

Duquesne Light Company- Residential Energy Efficiency Program  

Broader source: Energy.gov [DOE]

Duquesne Light provides rebates to its residential customers for purchasing and installing energy-saving equipment. Eligible equipment includes dehumidifiers, freezers, refrigerators, air...

92

Electrodeless lighting RF power source development. Final report  

SciTech Connect (OSTI)

An efficient, solid state RF power source has been developed on this NICE project for exciting low power electrodeless lamp bulbs. This project takes full advantage of concurrent advances in electrodeless lamp technology. Electrodeless lamp lighting systems utilizing the sulfur based bulb type developed by Fusion Lighting, Inc., is an emerging technology which is based on generating light in a confined plasma created and sustained by RF excitation. The bulb for such a lamp is filled with a particular element and inert gas at low pressure when cold. RF power from the RF source creates a plasma within the bulb which reaches temperatures approaching those of high pressure discharge lamp plasmas. At these temperatures the plasma radiates substantial visible light with a spectrum similar to sunlight.

NONE

1996-08-30T23:59:59.000Z

93

Reading Municipal Light Department- Business Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Reading Municipal Light Department (RMLD) offers energy efficiency incentives to eligible commercial and industrial customers. Rebates of up to $50,000 are available to customers who wish to reduce...

94

Garland Power and Light- Energy Efficiency Rebate Programs  

Broader source: Energy.gov [DOE]

Garland Power and Light (GP&L) offers the incentives to its residential, small commercial and commercial customers to increase the energy efficiency of homes and facilities. Rebates for...

95

Plasmonic Nanostructure Design for Efficient Light Coupling into Solar Cells  

E-Print Network [OSTI]

Plasmonic Nanostructure Design for Efficient Light Coupling into Solar Cells Vivian E. Ferry, Luke in thin film solar cells. In particular, the ability of plasmonic structures to localize light sunlight into guided modes in thin film Si and GaAs plasmonic solar cells whose back interface is coated

Atwater, Harry

96

Solar cell efficiency enhancement via light trapping in printable resonant  

E-Print Network [OSTI]

Solar cell efficiency enhancement via light trapping in printable resonant dielectric nanosphere for addressing the key challenge of light trapping in thin-film solar cells. We experimentally and theoretically, photovoltaics, resonant dielectric structures, solar cells * Corresponding author: e-mail jgrandid

Grandidier, Jonathan

97

Lighting Energy Efficiency in Parking Campaign  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-UpHeatMulti-Dimensionalthe10IO1OP001 LetterLight-Duty Lean GDI

98

Sandia National Laboratories: efficient LED lighting  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1development Sandia, NRELdeep-waterbiofuels economicallyefficient LED lighting

99

High efficiency III-nitride light-emitting diodes  

DOE Patents [OSTI]

Tailored doping of barrier layers enables balancing of the radiative recombination among the multiple-quantum-wells in III-Nitride light-emitting diodes. This tailored doping enables more symmetric carrier transport and uniform carrier distribution which help to reduce electron leakage and thus reduce the efficiency droop in high-power III-Nitride LEDs. Mitigation of the efficiency droop in III-Nitride LEDs may enable the pervasive market penetration of solid-state-lighting technologies in high-power lighting and illumination.

Crawford, Mary; Koleske, Daniel; Cho, Jaehee; Zhu, Di; Noemaun, Ahmed; Schubert, Martin F; Schubert, E. Fred

2013-05-28T23:59:59.000Z

100

Recommendations to Reduce Light Pollution and Energy Costs on the  

E-Print Network [OSTI]

(PAT18, PAT19, PAT27, PAT28, PAT29 - CL14): #12;· Change class #15, and class #20, incandescent bulbs with exterior fluorescent bulbs: · Change class #18 incandescent flood-light bulbs with fluorescent flood

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Light trapping in a 30-nm organic photovoltaic cell for efficient carrier collection and light absorption  

E-Print Network [OSTI]

We describe surface patterning strategies that permit high photon-collection efficiency together with high carrier-collection efficiency in an ultra-thin planar heterojunction organic photovoltaic cell. Optimized designs reach up to 50% photon collection efficiency in a P3HT layer of only 30 nm, representing a 3- to 5-fold improvement over an unpatterned cell of the same thickness. We compare the enhancement of light confinement in the active layer with an ITO top layer for TE and TM polarized light, and demonstrate that the light absorption can increase by a factor of 2 due to a gap-plasmon mode in the active layer.

Tsai, Cheng-Chia; Banerjee, Ashish; Osgood, Richard M; Englund, Dirk

2012-01-01T23:59:59.000Z

102

Efficient semiconductor light-emitting device and method  

DOE Patents [OSTI]

A semiconductor light-emitting device and method. The semiconductor light-emitting device is provided with at least one control layer or control region which includes an annular oxidized portion thereof to channel an injection current into the active region, and to provide a lateral refractive index profile for index guiding the light generated within the device. A periodic composition grading of at least one of the mirror stacks in the device provides a reduced operating voltage of the device. The semiconductor light-emitting device has a high efficiency for light generation, and may be formed either as a resonant-cavity light-emitting diode (RCLED) or as a vertical-cavity surface-emitting laser (VCSEL).

Choquette, Kent D. (Albuquerque, NM); Lear, Kevin L. (Albuquerque, NM); Schneider, Jr., Richard P. (Albuquerque, NM)

1996-01-01T23:59:59.000Z

103

Efficient semiconductor light-emitting device and method  

DOE Patents [OSTI]

A semiconductor light-emitting device and method are disclosed. The semiconductor light-emitting device is provided with at least one control layer or control region which includes an annular oxidized portion thereof to channel an injection current into the active region, and to provide a lateral refractive index profile for index guiding the light generated within the device. A periodic composition grading of at least one of the mirror stacks in the device provides a reduced operating voltage of the device. The semiconductor light-emitting device has a high efficiency for light generation, and may be formed either as a resonant-cavity light-emitting diode (RCLED) or as a vertical-cavity surface-emitting laser (VCSEL). 12 figs.

Choquette, K.D.; Lear, K.L.; Schneider, R.P. Jr.

1996-02-20T23:59:59.000Z

104

The Spectrum of Clean Energy Innovationinnovati nGreen Light-Emitting Diode Makes  

E-Print Network [OSTI]

- ing as an efficient solid-state light source, able to replace incandescent and compact fluorescent light bulbs in many applications. A new green LED from NREL may yield more efficient solid to accelerating market deployment, NREL works in partnership with private industry to drive the transformation

105

High Efficiency LED Lamp for Solid-State Lighting  

SciTech Connect (OSTI)

This report contains a summary of technical achievements during a three-year project to demonstrate high efficiency, solid-state lamps based on gallium nitride/silicon carbide light-emitting diodes. Novel chip designs and fabrication processes are described for a new type of nitride light-emitting diode with the potential for very high efficiency. This work resulted in the demonstration of blue light-emitting diodes in the one watt class that achieved up to 495 mW of light output at 350 mA drive current, corresponding to quantum and wall plug efficiencies of 51% and 45%, respectively. When combined with a phosphor in Cree's 7090 XLamp package, these advanced blue-emitting devices resulted in white light-emitting diodes whose efficacy exceeded 85 lumens per watt. In addition, up to 1040 lumens at greater than 85 lumens per watt was achieved by combining multiple devices to make a compact white lamp module with high optical efficiency.

James Ibbetson

2006-12-31T23:59:59.000Z

106

Energy-Efficient Lighting The typical American family spends more  

E-Print Network [OSTI]

Energy-Efficient Lighting The typical American family spends more than $1,500 a year on household energy bills--and many households spend considerably more. Costs could climb even higher in the future, as electricity and natural gas prices continue to rise. Investing money in energy-saving products like compact

107

Economic Analysis of Ilumex, A Project to Promote Energy-Efficient Residential Lighting in Mexico  

E-Print Network [OSTI]

Energy-Efficient Residential Lighting in Mexico J. Sathaye,Energy-Efficient Residential Lighting in Mexico J. Sathaye,of U.S. and Canadian lighting programs for the residential,

Sathaye, Jayant A.

2008-01-01T23:59:59.000Z

108

ENERGY EFFICIENT LIGHTING PROGRAM. CHAPTER FROM THE ENERGY AND ENVIRONMENT DIVISION ANNUAL REPORT 1979  

E-Print Network [OSTI]

L-80-08 ENERGY EFFICIENT LIGHTING PROGRAM Chapter from the11768 ENERGY EFFICIENT LIGHTING PROGRAM ANNUAL REPORT 1979Contract No. W-7405-ENG-48. LIGHTING S. Barman, R. Claar, J.

Berman, S.

2013-01-01T23:59:59.000Z

109

ENERGY EFFICIENT LIGHTING PROGRAM. CHAPTER FROM THE ENERGY AND ENVIRONMENT DIVISION ANNUAL REPORT 1979  

E-Print Network [OSTI]

W-39 EEB-L-80-08 ENERGY EFFICIENT LIGHTING PROGRAM ChapterL-80-08 LBL-11768 ENERGY EFFICIENT LIGHTING PROGRAM ANNUALREPORT 1979 FROM: Energy Efficient Buildings Program Chapter

Berman, S.

2013-01-01T23:59:59.000Z

110

High Efficiency Clean Combustion in Multi-Cylinder Light-Duty...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

& Publications High-Efficiency Clean Combustion in Light-Duty Multi-Cylinder Diesel Engines High Efficiency Clean Combustion in Multi-Cylinder Light-Duty Engines High Efficiency...

111

Thin Film Packaging Solutions for High Efficiency OLED Lighting Products  

SciTech Connect (OSTI)

The objective of the 'Thin Film Packaging Solutions for High Efficiency OLED Lighting Products' project is to demonstrate thin film packaging solutions based on SiC hermetic coatings that, when applied to glass and plastic substrates, support OLED lighting devices by providing longer life with greater efficiency at lower cost than is currently available. Phase I Objective: Demonstrate thin film encapsulated working phosphorescent OLED devices on optical glass with lifetime of 1,000 hour life, CRI greater than 75, and 15 lm/W. Phase II Objective: Demonstrate thin film encapsulated working phosphorescent OLED devices on plastic or glass composite with 25 lm/W, 5,000 hours life, and CRI greater than 80. Phase III Objective: Demonstrate 2 x 2 ft{sup 2} thin film encapsulated working phosphorescent OLED with 40 lm/W, 10,000 hour life, and CRI greater than 85. This report details the efforts of Phase III (Budget Period Three), a fourteen month collaborative effort that focused on optimization of high-efficiency phosphorescent OLED devices and thin-film encapsulation of said devices. The report further details the conclusions and recommendations of the project team that have foundation in all three budget periods for the program. During the conduct of the Thin Film Packaging Solutions for High Efficiency OLED Lighting Products program, including budget period three, the project team completed and delivered the following achievements: (1) a three-year marketing effort that characterized the near-term and longer-term OLED market, identified customer and consumer lighting needs, and suggested prototype product concepts and niche OLED applications lighting that will give rise to broader market acceptance as a source for wide area illumination and energy conservation; (2) a thin film encapsulation technology with a lifetime of nearly 15,000 hours, tested by calcium coupons, while stored at 16 C and 40% relative humidity ('RH'). This encapsulation technology was characterized as having less than 10% change in transmission during the 15,000 hour test period; (3) demonstrated thin film encapsulation of a phosphorescent OLED device with 1,500 hours of lifetime at 60 C and 80% RH; (4) demonstrated that a thin film laminate encapsulation, in addition to the direct thin film deposition process, of a polymer OLED device was another feasible packaging strategy for OLED lighting. The thin film laminate strategy was developed to mitigate defects, demonstrate roll-to-roll process capability for high volume throughput (reduce costs) and to support a potential commercial pathway that is less dependent upon integrated manufacturing since the laminate could be sold as a rolled good; (5) demonstrated that low cost 'blue' glass substrates could be coated with a siloxane barrier layer for planarization and ion-protection and used in the fabrication of a polymer OLED lighting device. This study further demonstrated that the substrate cost has potential for huge cost reductions from the white borosilicate glass substrate currently used by the OLED lighting industry; (6) delivered four-square feet of white phosphorescent OLED technology, including novel high efficiency devices with 82 CRI, greater than 50 lm/W efficiency, and more than 1,000 hours lifetime in a product concept model shelf; (7) presented and or published more than twenty internal studies (for private use), three external presentations (OLED workshop-for public use), and five technology-related external presentations (industry conferences-for public use); and (8) issued five patent applications, which are in various maturity stages at time of publication. Delivery of thin film encapsulated white phosphorescent OLED lighting technology remains a challenging technical achievement, and it seems that commercial availability of thin, bright, white OLED light that meets market requirements will continue to require research and development effort. However, there will be glass encapsulated white OLED lighting products commercialized in niche markets during the 2008 calendar year. This commercializ

None

2008-06-30T23:59:59.000Z

112

High-Efficiency Nitride-Base Photonic Crystal Light Sources  

SciTech Connect (OSTI)

The research activities performed in the framework of this project represent a major breakthrough in the demonstration of Photonic Crystals (PhC) as a competitive technology for LEDs with high light extraction efficiency. The goals of the project were to explore the viable approaches to manufacturability of PhC LEDS through proven standard industrial processes, establish the limits of light extraction by various concepts of PhC LEDs, and determine the possible advantages of PhC LEDs over current and forthcoming LED extraction concepts. We have developed three very different geometries for PhC light extraction in LEDs. In addition, we have demonstrated reliable methods for their in-depth analysis allowing the extraction of important parameters such as light extraction efficiency, modal extraction length, directionality, internal and external quantum efficiency. The information gained allows better understanding of the physical processes and the effect of the design parameters on the light directionality and extraction efficiency. As a result, we produced LEDs with controllable emission directionality and a state of the art extraction efficiency that goes up to 94%. Those devices are based on embedded air-gap PhC - a novel technology concept developed in the framework of this project. They rely on a simple and planar fabrication process that is very interesting for industrial implementation due to its robustness and scalability. In fact, besides the additional patterning and regrowth steps, the process is identical as that for standard industrially used p-side-up LEDs. The final devices exhibit the same good electrical characteristics and high process yield as a series of test standard LEDs obtained in comparable conditions. Finally, the technology of embedded air-gap patterns (PhC) has significant potential in other related fields such as: increasing the optical mode interaction with the active region in semiconductor lasers; increasing the coupling of the incident light into the active region of solar cells; increasing the efficiency of the phosphorous light conversion in white light LEDs etc. In addition to the technology of embedded PhC LEDs, we demonstrate a technique for improvement of the light extraction and emission directionality for existing flip-chip microcavity (thin) LEDs by introducing PhC grating into the top n-contact. Although, the performances of these devices in terms of increase of the extraction efficiency are not significantly superior compared to those obtained by other techniques like surface roughening, the use of PhC offers some significant advantages such as improved and controllable emission directionality and a process that is directly applicable to any material system. The PhC microcavity LEDs have also potential for industrial implementation as the fabrication process has only minor differences to that already used for flip-chip thin LEDs. Finally, we have demonstrated that achieving good electrical properties and high fabrication yield for these devices is straightforward.

James Speck; Evelyn Hu; Claude Weisbuch; Yong-Seok Choi; Kelly McGroddy; Gregor Koblmuller; Elison Matioli; Elizabeth Rangel; Fabian Rol; Dobri Simeonov

2010-01-31T23:59:59.000Z

113

Lighting energy efficiency opportunities at Cheyenne Mountain Air Station  

SciTech Connect (OSTI)

CMAS is an intensive user of electricity for lighting because of its size, lack of daylight, and 24-hour operating schedule. Argonne National Laboratory recently conducted a lighting energy conservation evaluation at CMAS. The evaluation included inspection and characterization of existing lighting systems, analysis of energy-efficient retrofit options, and investigation of the environmental effects that these lighting system retrofits could have when they are ready to be disposed of as waste. Argonne devised three retrofit options for the existing lighting systems at various buildings: (1) minimal retrofit--limited fixture replacement; (2) moderate retrofit--more extensive fixture replacement and limited application of motion detectors; and (3) advanced retrofit--fixture replacement, reduction in the number of lamps, expansion of task lighting, and more extensive application of motion detectors. Argonne used data on electricity consumption to analyze the economic and energy effects of these three retrofit options. It performed a cost analysis for each retrofit option in terms of payback. The analysis showed that lighting retrofits result in savings because they reduce electricity consumption, cooling load, and maintenance costs. The payback period for all retrofit options was found to be less than 2 years, with the payback period decreasing for more aggressive retrofits. These short payback periods derived largely from the intensive (24-hours-per-day) use of electric lighting at the facility. Maintenance savings accounted for more than half of the annual energy-related savings under the minimal and moderate retrofit options and slightly less than half of these savings under the advanced retrofit option. Even if maintenance savings were excluded, the payback periods would still be impressive: about 4.4 years for the minimal retrofit option and 2 years for the advanced option. The local and regional environmental impacts of the three retrofit options were minimal.

Molburg, J.C.; Rozo, A.J.; Sarles, J.K.; Haffenden, R.A.; Thimmapuram, P.R.; Cavallo, J.D.

1996-06-01T23:59:59.000Z

114

Induction Lighting: An Old Lighting Technology Made New Again...  

Broader source: Energy.gov (indexed) [DOE]

around the same time that his rival, Thomas Edison, was working to improve the incandescent light bulb. In the early 1990s, several major lighting manufacturers introduced...

115

Improving the Efficiency of Light-Duty Vehicle HVAC Systems using...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Light-Duty Vehicle HVAC Systems using Zonal Thermoelectric Devices and Comfort Modeling Improving the Efficiency of Light-Duty Vehicle HVAC Systems using Zonal Thermoelectric...

116

Seattle City Light- Multi-Family Residential Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Seattle City Light provides incentives for its multi-family housing customers to increase their energy efficiency. Rebates are offered for common area lighting and weatherization measures including...

117

High-Efficiency Nitride-Based Solid-State Lighting  

SciTech Connect (OSTI)

In this final technical progress report we summarize research accomplished during Department of Energy contract DE-FC26-01NT41203, entitled ''High-Efficiency Nitride-Based Solid-State Lighting''. Two teams, from the University of California at Santa Barbara (Principle Investigator: Dr. Shuji Nakamura) and the Lighting Research Center at Rensselaer Polytechnic Institute (led by Dr. N. Narendran), pursued the goals of this contract from thin film growth, characterization, and packaging/luminaire design standpoints. The UCSB team initially pursued the development of blue gallium nitride (GaN)-based vertical-cavity surface-emitting lasers, as well as ultraviolet GaN-based light emitting diodes (LEDs). In Year 2, the emphasis shifted to resonant-cavity light emitting diodes, also known as micro-cavity LEDs when extremely thin device cavities are fabricated. These devices have very directional emission and higher light extraction efficiency than conventional LEDs. Via the optimization of thin-film growth and refinement of device processing, we decreased the total cavity thickness to less than 1 {micro}m, such that micro-cavity effects were clearly observed and a light extraction efficiency of over 10% was reached. We also began the development of photonic crystals for increased light extraction, in particular for so-called ''guided modes'' which would otherwise propagate laterally in the device and be re-absorbed. Finally, we pursued the growth of smooth, high-quality nonpolar a-plane and m-plane GaN films, as well as blue light emitting diodes on these novel films. Initial nonpolar LEDs showed the expected behavior of negligible peak wavelength shift with increasing drive current. M-plane LEDs in particular show promise, as unpackaged devices had unsaturated optical output power of {approx} 3 mW at 200 mA drive current. The LRC's tasks were aimed at developing the subcomponents necessary for packaging UCSB's light emitting diodes, and packaging them to produce a white light fixture. During the third and final year of the project, the LRC team investigated alternate packaging methods for the white LED device to achieve at least 25 percent more luminous efficacy than traditional white LEDs; conducted optical ray-tracing analyses and human factors studies to determine the best form factor for the white light source under development, in terms of high luminous efficacy and greater acceptance by subjects; and developed a new die encapsulant using silicone-epoxy resins that showed less yellowing and slower degradation. At the conclusion of this project, the LRC demonstrated a new packaging method, called scattered photon extraction (SPE), that produced an average luminous flux and corresponding average efficacy of 90.7 lm and 36.3 lm/W, respectively, compared with 56.5 lm and 22.6 lm/W for a similar commercial white LED package. At low currents, the SPE package emitted white light with an efficacy of over 80 lm/W and had chromaticity values very close to the blackbody locus. The SPE package showed an overall improvement of 61% for this particular comparison, exceeding the LRC's third-year goal of 25% improvement.

Paul T. Fini; Shuji Nakamura

2005-07-30T23:59:59.000Z

118

LED Provides Effective and Efficient Parking Area Lighting at...  

Broader source: Energy.gov (indexed) [DOE]

White Light Options for Parking Area Lighting Demonstration Assessment of Light Emitting Diode (LED) Street Lighting, Final Report Guide to FEMP-Designated Parking Lot...

119

Alliant Energy Interstate Power and Light (Gas)- Residential Energy Efficiency Program  

Broader source: Energy.gov [DOE]

Interstate Power and Light (Alliant Energy) offers a number of rebates for energy efficiency for Minnesota residential customers a variety of high efficiency heating and cooling measures, including...

120

High-Efficiency and Stable White Organic Light-Emitting Diode...  

Broader source: Energy.gov (indexed) [DOE]

Efficiency and Stable White Organic Light-Emitting Diode Using a Single Emitter High-Efficiency and Stable White Organic Light-Emitting Diode Using a Single Emitter Presenter: Jian...

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Webinar: Award-Winning LEEP Campaign Sites Demonstrate Big Savings in High Efficiency Parking Lighting  

Broader source: Energy.gov [DOE]

The Lighting Energy Efficiency in Parking (LEEP) Campaign is saving nearly 45 million kilowatt-hours and $4 million annually by upgrading its partners to high efficiency lighting in over 500,000 parking spaces.

122

High-Efficiency Clean Combustion in Light-Duty Multi-Cylinder...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

High-Efficiency Clean Combustion in Light-Duty Multi-Cylinder Diesel Engines High-Efficiency Clean Combustion in Light-Duty Multi-Cylinder Diesel Engines 2010 DOE Vehicle...

123

High Efficiency Clean Combustion in Multi-Cylinder Light-Duty...  

Broader source: Energy.gov (indexed) [DOE]

Efficiency Clean Combustion in Multi-Cylinder Light-Duty Engines High Efficiency Clean Combustion in Multi-Cylinder Light-Duty Engines 2012 DOE Hydrogen and Fuel Cells Program and...

124

HIGH-EFFICIENCY NITRIDE-BASED SOLID-STATE LIGHTING  

SciTech Connect (OSTI)

In this semiannual report we summarize the progress obtained in the first six months with the support of DoE contract No.DE-FC26-01NT41203, entitled ''High-Efficiency Nitride-Based Solid-State Lighting''. The two teams, from the University of California at Santa Barbara (Principle Investigator: Dr. Shuji Nakamura) and Rensselaer Polytechnic Institute (led by Dr. N. Narendran), are pursuing the goals of this contract from thin film growth, characterization, and packaging standpoints. The UCSB team has made significant progress in the development of GaN vertical cavity surface-emitting lasers (VCSELs) as well as light-emitting diodes (LEDs) with AlGaN active regions emitting in the ultraviolet (UV). The Rensselaer team has developed target specifications for some of the key parameters for the proposed solid-state lighting system, including a luminous flux requirement matrix for various lighting applications, optimal spectral power distributions, and the performance characteristics of currently available commercial LEDs for eventual comparisons to the devices developed in the scope of this project.

Dr. Paul T. Fini; Prof. Shuji Nakamura

2002-04-30T23:59:59.000Z

125

HIGH-EFFICIENCY NITRIDE-BASED SOLID-STATE LIGHTING  

SciTech Connect (OSTI)

In this annual report we summarize the progress obtained in the first year with the support of DoE contract No.DE-FC26-01NT41203, entitled ''High-Efficiency Nitride-Based Solid-State Lighting''. The two teams, from the University of California at Santa Barbara (Principle Investigator: Dr. Shuji Nakamura) and Rensselaer Polytechnic Institute (led by Dr. N. Narendran), are pursuing the goals of this contract from thin film growth, characterization, and packaging standpoints. The UCSB team has made significant progress in the development of GaN vertical cavity surface-emitting lasers (VCSELs) as well as light-emitting diodes (LEDs) with AlGaN active regions emitting in the ultraviolet (UV). The Rensselaer team has developed target specifications for some of the key parameters for the proposed solid-state lighting system, including a luminous flux requirement matrix for various lighting applications, optimal spectral power distributions, and the performance characteristics of currently available commercial LEDs for eventual comparisons to the devices developed in the scope of this project.

Dr. Paul T. Fini; Prof. Shuji Nakamura

2002-09-01T23:59:59.000Z

126

Efficiency and stray light measurements and calculations of diffraction gratings for the Advanced Light Source  

SciTech Connect (OSTI)

Water-cooled gratings manufactured for spherical grating monochromators of the Advanced Light Source beamlines 7.0, 8.0, and 9.0 were measured with the laser plasma source and reflectometer in the Center for X-ray Optics at Lawrence Berkeley Laboratory. The square-wave gratings are ion milled into the polished electroless nickel surface after patterning by holographic photolithography. Absolute efficiency data are compared with exact electromagnetic theory calculation. Interorder stray light and groove depths can be estimated from the measurements.

McKinney, W.R.; Mossessian, D. (Accelerator and Fusion Research Division, Advanced Light Source, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)); Gullikson, E. (Materials Sciences Division, Center for X-ray Optics, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)); Heimann, P. (Accelerator and Fusion Research Division, Advanced Light Source, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States))

1995-02-01T23:59:59.000Z

127

Ceramic Mugs & Dishes Incandescent Light Bulbs  

E-Print Network [OSTI]

, MU East Rock Hall/19-B CELL PHONES - EYEGLASSES 654 Minnesota Street Room 208, copy room CVRI Helen. Zion Cancer Research Building N423 Parnassus Campus: eyeglasses "I" level, Optometry Store, MU West

Yamamoto, Keith

128

Fundamentals of PV Efficiency: Limits for Light Absorption  

E-Print Network [OSTI]

A simple thermodynamic argument related to a (weakly absorbing) finite dielectric slab illuminated by sunlight- originally suggested by Yablonovich- leads to the conclusion that the absorption in a dielectric can at best be increased by a factor 4n2. Therefore, the absorption in these materials is always imperfect; the Shockley-Queisser limit can be achieved only asymptotically. In this paper, we make the connection between the degradation in efficiency and the Yablonovich limit explicit and re-derive the 4n2 limit by intuitive geometrical arguments based on Snell's law and elementary rules of probability. Remarkably, the re-derivation suggests strategies of breaking the traditional limit and improving PV efficiency by enhanced light absorption.

M. Ryyan Khan; Xufeng Wang; Muhammad A. Alam

2012-12-13T23:59:59.000Z

129

Engineering for Environmental Sustainability http://engineering.tufts.edu/ Energy-efficient Visible Light Communication  

E-Print Network [OSTI]

Engineering for Environmental Sustainability http://engineering.tufts.edu/ Energy-efficient Visible of a new era of energy-efficient lighting bringing revolutionary advances in the use of light technology is key to realizing energy-efficient "smart lighting systems". To extend the bandwidth

Tufts University

130

Light-emitting diode spherical packages: an equation for the light transmission efficiency  

E-Print Network [OSTI]

Virtually all light-emitting diodes (LEDs) are encapsulated with a transparent epoxy or silicone-gel. In this paper we analyze the optical efficiency of spherical encapsulants. We develop a quasi-radiometric equation for the light transmission efficiency, which incorporates some ideas of Monte-Carlo ray tracing into the context of radiometry. The approach includes the extended source nature of the LED chip, and the chip radiance distribution. The equation is an explicit function of the size and the refractive index of the package, and also of several chip parameters such as shape, size, radiance, and location inside the package. To illustrate the use of this equation, we analyze several packaging configurations of practical interest; for example, a hemispherical dome with multiple chips, a flat encapsulation as a special case of the spherical package, and approximate calculations of an encapsulant with a photonic crystal LED or with a photonic quasi crystal LED. These calculations are compared with Monte-Carl...

Moreno, Ivan; Avendano-Alejo, Maximino; 10.1364/AO.49.000012

2011-01-01T23:59:59.000Z

131

Efficient energy transfer in light-harvesting systems, I: optimal temperature, reorganization energy, and spatial-  

E-Print Network [OSTI]

Efficient energy transfer in light-harvesting systems, I: optimal temperature, reorganization of efficient and robust energy transfer in light-harvesting systems provides new insights for the optimal the efficiency and maintain its stability. With the Haken-Strobl model, the maximal energy transfer efficiency

Cao, Jianshu

132

Stalled on the Road to the Market: Analysis of Field Experience with a Project to Promote Lighting Efficiency in India  

E-Print Network [OSTI]

1991. "Energy-Efficient Lighting in Brazil and India:on Energy-Efficient Lighting. Stockholm, Sweden. Katzev,with a Project to Promote Lighting Efficiency in India AJ.

Gadgil, A.J.

2008-01-01T23:59:59.000Z

133

IMPROVING ENERGY EFFICIENCY AND REDUCING COSTS IN THE DRINKING WATER SUPPLY INDUSTRY: An ENERGY STAR Resource Guide for Energy and Plant Managers  

E-Print Network [OSTI]

energy consumed by an incandescent bulb is emitted in thefluorescent (CFL), and incandescent lights typically arelamps in place of incandescent bulbs in most cases; and

Brown, Moya Melody, Camilla Dunham Whitehead, Rich

2011-01-01T23:59:59.000Z

134

Estimate of Cost-Effective Potential for Minimum Efficiency Performance Standards in 13 Major World Economies Energy Savings, Environmental and Financial Impacts  

E-Print Network [OSTI]

lighting, we assume that incandescent bulbs have a one-yeargigaton Indonesia India incandescent Lamp Japan Koreaprice data for 60-watt incandescent bulbs, excluding non-

Letschert, Virginie E.

2013-01-01T23:59:59.000Z

135

Over the past decade, lighting became more efficient across all...  

Broader source: Energy.gov (indexed) [DOE]

of light output (in lumen-hours) provided by each lamp type. "Other" includes light-emitting diode (LED) lamps as well as other lamps such as fiber optic lights, induction lamps,...

136

Antennas in the optical range will improve the efficiency of light-emitting devices.  

E-Print Network [OSTI]

absorption cross-sections and quan- tum yields in photovoltaics, releasing energy efficiently from nanoscaleAntennas in the optical range will improve the efficiency of light-emitting devices. The purpose frequencies. It is hoped that optical antennas can increase the efficiency of light-matter interactions

Novotny, Lukas

137

Florida Power and Light- Business Energy Efficiency Rebates  

Broader source: Energy.gov [DOE]

Florida Power and Light (FPL) offers incentives for its business customers to upgrade the HVAC system, building envelope, water heating, refrigeration and lighting systems. The individual rebates...

138

Replacement of Lighting Fixtures with LED Energy Efficient Lights at the Parking Facility, Milwaukee, Wisconsin  

SciTech Connect (OSTI)

The Forest County Potawatomi Community (FCPC or Tribe) owns a six-story parking facility adjacent to its Potawatomi Bingo Casino (the Casino) in Milwaukee, Wisconsin, as well as a valet parking facility under the Casino (collectively, the Parking Facility). The Parking Facility contained 205-watt metal halide-type lights that, for security reasons, operated 24 hours per day, 7 days per week. Starting on August 30, 2010, the Tribe replaced these fixtures with 1,760 state-of-the-art, energy efficient 55-Watt LED lights. This project resulted in an immediate average reduction in monthly peak demand of 238 kW over the fourth quarter of 2010. The average reduction in monthly peak demand from October 1 through December 31, 2010 translates into a forecast annual electrical energy reduction of approximately 1,995,000 kWh or 47.3% of the pre-project demand. This project was technically effective, economically feasible, and beneficial to the public not only in terms of long term energy efficiency and associated emissions reductions, but also in the short-term jobs provided for the S.E. Wisconsin region. The project was implemented, from approval by U.S. Department of Energy (DOE) to completion, in less than 6 months. The project utilized off-the-shelf proven technologies that were fabricated locally and installed by local trade contractors.

David Brien

2012-06-21T23:59:59.000Z

139

Efficient estimation of energy transfer efficiency in light-harvesting complexes  

E-Print Network [OSTI]

The fundamental physical mechanisms of energy transfer in photosynthetic complexes is not yet fully understood. In particular, the degree of efficiency or sensitivity of these systems for energy transfer is not known given their non-perturbative and non-Markovian interactions with proteins backbone and surrounding photonic and phononic environments. One major problem in studying light-harvesting complexes has been the lack of an efficient method for simulation of their dynamics in biological environments. To this end, here we revisit the second-order time-convolution (TC2) master equation and examine its reliability beyond extreme Markovian and perturbative limits. In particular, we present a derivation of TC2 without making the usual weak system-bath coupling assumption. Using this equation, we explore the long time behaviour of exciton dynamics of Fenna-Matthews-Olson (FMO) protein complex. Moreover, we introduce a constructive error analysis to estimate the accuracy of TC2 equation in calculating energy transfer efficiency, exhibiting reliable performance for environments with weak and intermediate memory and strength. Furthermore, we numerically show that energy transfer efficiency is optimal and robust for the FMO protein complex of green sulphur bacteria with respect to variations in reorganization energy and bath correlation time-scales.

Alireza Shabani; Masoud Mohseni; Herschel Rabitz; Seth Lloyd

2012-04-13T23:59:59.000Z

140

Energy efficient control of polychromatic solid state lighting using a sensor network  

E-Print Network [OSTI]

Motivated by opportunities in smart lighting, energy efficiency, and ubiquitous sensing, we present the design of polychromatic solid-state lighting controlled using a sensor network. We developed both a spectrally tunable ...

Paradiso, Joseph A.

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

High efficiency SHG of orbital angular momentum light in an external cavity  

E-Print Network [OSTI]

Traditional methods for generating orbital angular momentum (OAM) light include holographic diffraction gratings, vortex phase plate and spatial light modulator. In this article, we report a new method for high efficient OAM light generation. By pumping an external cavity contains a quasi phase matching nonlinear crystal with a fundamental OAM carrying light and properly aligning the cavity, mode matching between the pump light and the cavitys higher order Laguerre-Gaussian (LG) mode is achieved, conversion efficiency up to 10.3 percentage have been obtained. We have demonstrated that the cavity can stably operate at its higher order LG mode just as Gaussian mode for the first time. The SHG light possesses a doubled OAM value with respect to the pump light. The parameters that affect the beam quality and conversion efficiency are discussed in detail. Our work opens a brand new field in laser optics, and makes the first step toward high efficiency OAM light processing.

Zhi-Yuan Zhou; Yan Li; Dong-Sheng Ding; Yun-Kun Jiang; Wei Zhang; Shuai Shi; Bao-Sen Shi; Guang-Can Guo

2014-05-12T23:59:59.000Z

142

High Efficiency Clean Combustion in Multi-Cylinder Light-Duty...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Light-Duty Multi-Cylinder Engine High Efficiency Clean Combustion in Multi-Cylinder Light-Duty Engines Vehicle Technologies Office Merit Review 2014: Impacts of Advanced Combustion...

143

Energy Efficiency and Conservation Block Grant Program  

Broader source: Energy.gov (indexed) [DOE]

retrofits throughout the Village. These lighting retrofits would involve upgrading incandescent light fixtures to those that will accommodate compact fluorescent bulbs. In...

144

Alliant Energy Interstate Power and Light (Gas)- Residential Energy Efficiency Program  

Broader source: Energy.gov [DOE]

Interstate Power and Light (Alliant Energy) offers residential energy efficiency rebates to Iowa customers for a variety of home upgrades. Rebates are available for certain heating, insulation,...

145

Alliant Energy Interstate Power and Light (Gas)- Business Energy Efficiency Rebate Programs (Minnesota)  

Broader source: Energy.gov [DOE]

Alliant Energy - Interstate Power and Light (IPL) offers rebates for high efficiency equipment for commercial customers. Rebates are available for windows/sashes, programmable thermostats, water...

146

Carbon Power and Light- Residential and Commercial Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Carbon Power and Light, in collaboration with Tri-State Generation and Transmission Association, offers financial incentives for members to increase the energy efficiency of homes and facilities....

147

Kansas City Power and Light- Commercial/Industrial Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Kansas City Power and Light (KCP&L) provides financial incentives for commercial and industrial customers to increase the energy efficiency of eligible facilities. Rebates are available for...

148

Cheyenne Light, Fuel and Power (Gas)- Commercial and Industrial Efficiency Rebate Program (Wyoming)  

Broader source: Energy.gov [DOE]

Cheyenne Light, Fuel and Power (CLFP) offers incentives to commercial and industrial gas customers who install energy efficient equipment in existing buildings. Incentives are available for boilers...

149

McMinnville Water and Light- Residential Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

McMinnville Water and Light (MWL) offers rebates on energy efficient homes, appliances and equipment to their residential customers. Rebates are valid on refrigerators, freezers, clothes washer,...

150

Cheyenne Light, Fuel and Power (Gas)- Residential Energy Efficiency Rebate Program (Wyoming)  

Broader source: Energy.gov [DOE]

Cheyenne Light, Fuel and Power offers incentives to gas customers who construct new energy efficient homes or install energy efficient equipment in existing homes. Incentives are available for home...

151

Dayton Power and Light- Business and Government Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Dayton Power and Light's (DP&L) non-residential electricity customers are eligible for energy efficient technology rebates. Rebates are available for energy efficiency measures added to an...

152

Seattle City Light- Commercial Energy Efficiency Rebate Programs  

Broader source: Energy.gov [DOE]

Seattle City Light offers a variety of rebates to commercial and industrial customers through the [http://www.seattle.gov/light/conserve/business/cv5_fi.htm Energy Smart Services Program]. Energy...

153

Economic Analysis of Ilumex, A Project to Promote Energy-Efficient Residential Lighting in Mexico  

E-Print Network [OSTI]

Results for Replaceable Incandescent Lamps GUADALAJARA:new pesoslkWh respectively. Incandescent bulb purchase iscompared to conventional incandescent lamps, but its much

Sathaye, Jayant A.

2008-01-01T23:59:59.000Z

154

Confocal microphotoluminescence of InGaN-based light-emitting diodes Koichi Okamoto,a  

E-Print Network [OSTI]

for conventional incandescent and fluorescent light bulbs.5 However, luminous efficacies of commercial white LEDs spectrum region, the external quantum efficiency ext of the LED has achieved 20% at room temperature 25 lm/W have been still lower than that of fluorescent tubes 75 lm/W . Thus, the most important re

Okamoto, Koichi

155

Enhancement in light emission and electrical efficiencies of a silicon nanocrystal light-emitting diode by indium tin oxide nanowires  

SciTech Connect (OSTI)

We report an enhancement in light emission and electrical efficiencies of a Si nanocrystal (NC) light-emitting diode (LED) by employing indium tin oxide (ITO) nanowires (NWs). The formed ITO NWs (diameter?light output power and wall-plug efficiency from the Si NC LED were enhanced by 45% and 38%, respectively. This was originated from an enhancement in the escape probability of the photons generated in the Si NCs due to multiple scatterings at the surface of ITO NWs acting as a light waveguide. We show here that the use of the ITO NWs can be very useful for realizing a highly efficient Si NC LED.

Huh, Chul, E-mail: chuh@etri.re.kr; Kim, Bong Kyu; Ahn, Chang-Geun; Kim, Sang-Hyeob [IT Convergence Technology Research Laboratory, Electronics and Telecommunications Research Institute, Daejeon 305-350 (Korea, Republic of); Choi, Chel-Jong [Department of BIN Fusion Technology, Chonbuk National University, Jeonju 561-756 (Korea, Republic of)

2014-07-21T23:59:59.000Z

156

A high-efficiency indirect lighting system utilizing the solar 1000 sulfur lamp  

SciTech Connect (OSTI)

High-lumen light sources represent unique challenges and opportunities for the design of practical and efficient interior lighting systems. High-output sources require a means of large-scale distribution and avoidance of high-luminance glare while providing efficient delivery. An indirect lighting system has been developed for use with a 1,000 Watt sulfur lamp that efficiently utilizes the high-output source to provide quality interior lighting. This paper briefly describes the design and initial testing of this new system.

Siminovitch, M.; Gould, C.; Page, E.

1997-06-01T23:59:59.000Z

157

ORIGINAL ARTICLE Highly efficient GaAs solar cells by limiting light emission  

E-Print Network [OSTI]

ORIGINAL ARTICLE Highly efficient GaAs solar cells by limiting light emission angle Emily D Kosten1 solar cell under direct sunlight, light is received from the solar disk, but is re-emitted isotropically.1038/lsa.2013.1; published online 4 January 2013 Keywords: detailed balance; GaAs solar cell; light

Atwater, Harry

158

High efficiency light emitting diode with anisotropically etched GaN-sapphire interface  

E-Print Network [OSTI]

High efficiency light emitting diode with anisotropically etched GaN- sapphire interface M. H. Lo and optimization of a light-emitting diode projection micro-stereolithography three-dimensional manufacturingGaN micro-light emitting diodes Appl. Phys. Lett. 101, 231110 (2012) A bright cadmium-free, hybrid organic

159

MEMS `SMART DUST MOTES' FOR DESIGNING, MONITORING AND ENABLING EFFICIENT LIGHTING  

E-Print Network [OSTI]

-based lighting system has the potential to achieve many environmental benefits in comparison to existing sensorMEMS `SMART DUST MOTES' FOR DESIGNING, MONITORING AND ENABLING EFFICIENT LIGHTING Alice M. Agogino focused on office lighting monitoring and control based on the new MEMS `smart dust mote' sensor

Agogino, Alice M.

160

Understanding the Mechanism of Highly Efficient Nanoparticle-Mediated Conversion of Light to Steam  

E-Print Network [OSTI]

Conversion of Light to Steam Nathaniel J. Hogan,1 Alexander Urban,2 Alberto Pimpinelli,3 Ciceron Ayala in the application of light-harvesting nanoparticles as efficient producers of solar steam. With broad the mechanism whereby such particles convert light into usable steam is a crucial step. Much debate has centered

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Efficient narrow-band light emission from a single carbon nanotube pn diode  

E-Print Network [OSTI]

Efficient narrow-band light emission from a single carbon nanotube p­n diode Thomas Mueller1 and Phaedon Avouris1 * Electrically driven light emission from carbon nanotubes1­8 could be used in nanoscale. Here, we report electrically induced light emission from individual carbon nanotube p­n diodes. A new

Perebeinos, Vasili

162

Department of Energy Announces Philips Lighting North America...  

Energy Savers [EERE]

Product Delivers on Department's Challenge to Replace Common Light Bulb with Energy-Saving Lighting Alternative Washington, D.C. - The U.S. Department of Energy today...

163

Impact of geometry on light collection efficiency of scintillation detectors for cryogenic rare event searches  

E-Print Network [OSTI]

Simulations of photon propagation in scintillation detectors were performed with the aim to find the optimal scintillator geometry, surface treatment, and shape of external reflector in order to achieve maximum light collection efficiency for detector configurations that avoid direct optical coupling, a situation that is commonly found in cryogenic scintillating bolometers in experimental searches for double beta decay and dark matter. To evaluate the light collection efficiency of various geometrical configurations we used the ZEMAX ray-tracing software. It was found that scintillators in the shape of a triangular prism with an external mirror shaped as truncated cone gives the highest light collection efficiency. The results of the simulations were confirmed by carrying out measurements of the light collection efficiencies of CaWO4 crystal scintillators. A comparison of simulated and measured values of light output shows good agreement

F. A. Danevich; V. V. Kobychev; R. V. Kobychev; H. Kraus; V. B. Mikhailik; V. M. Mokina; I. M. Solsky

2014-04-30T23:59:59.000Z

164

Forest Grove Light and Power- Energy Efficiency Rebate Programs  

Broader source: Energy.gov [DOE]

Forest Grove Light and Power offers a variety of rebates through their Conservation Services Department. Rebates vary based on technology, and are available to residential, commercial, and/or...

165

Inland Power and Light Company- Residential Energy Efficiency Rebate Programs  

Broader source: Energy.gov [DOE]

Inland Power and Light offers a variety of rebates through the Conservation Services program. The Performance Tested Comfort Systems (PTCS) Heating/Cooling and Duct Sealing Rebate program offers...

166

Duquesne Light Company- Commercial and Industrial Energy Efficiency Program  

Broader source: Energy.gov [DOE]

Duquesne Light provides rebates on energy-saving equipment to commercial and industrial customers in the eligible service territory. There are 2 types of rebate programs available to all C&I...

167

Print this article Close This Window Toy-Based Robots Walk More Efficiently -Report  

E-Print Network [OSTI]

fluorescent light bulb, allows an element of control for the walker to make more than a few steps and adjust

Ruina, Andy L.

168

Max Tech and Beyond: Maximizing Appliance and Equipment Efficiency by Design  

E-Print Network [OSTI]

LED) replace conventional incandescent lighting Heat pumpreplacing Only the residential sector remains incandescentdominantly incandescent. Although bulbs, primarily in LED

Desroches, Louis-Benoit

2012-01-01T23:59:59.000Z

169

Electro-luminescent cooling: light emitting diodes above unity efficiency  

E-Print Network [OSTI]

Experimental demonstration of net electro-luminescent cooling in a diode, or equivalently electroluminescence with wall-plug efficiency greater than unity, had eluded direct observation for more than five decades. We review ...

Santhanam, Parthiban

170

A Dual Supply Buck Converter with Improved Light Load Efficiency  

E-Print Network [OSTI]

to reduce the switching loss by reducing the effective input supply voltage at light load. This is achieved by switching between two different input voltages (3.3V and 1.65V) depending on the output current value. Experimental results show...

Chen, Hui

2013-05-02T23:59:59.000Z

171

Thermoelectrically Pumped Light-Emitting Diodes Operating above Unity Efficiency  

E-Print Network [OSTI]

A heated semiconductor light-emitting diode at low forward bias voltage V

Santhanam, Parthiban

172

Dynamical systems in nanophotonics: From energy efficient modulators to light forces and optomechanics  

E-Print Network [OSTI]

We demonstrate novel device concepts based on rigorous design of the dynamics of resonant nanophotonic systems, such as dispersionless resonant switches and energy-efficient mo-dulator architectures, slow-light cells, and ...

Kaertner, Franz X.

173

CoServ Electric Cooperative- Commercial Energy Efficient Lighting Rebate Program  

Broader source: Energy.gov [DOE]

CoServ Electric Cooperative provides rebates for commercial and industrial customers who upgrade to high efficiency lighting for the workplace. A rebate of $0.30/watt saved is available on custom...

174

Memphis Light, Gas and Water (Electric)- Commercial Efficiency Advice and Incentives Program  

Broader source: Energy.gov [DOE]

Memphis Light, Gas and Water (MLGW), in partnership with the Tennessee Valley Authority (TVA), offers a variety of energy efficient incentives to non-residential customers. The program provides...

175

McMinnville Water and Light- Commercial Energy Efficiency Rebate Programs  

Broader source: Energy.gov [DOE]

McMinnville Water and Light Company offers a variety of rebates for commercial and industrial customers to make energy efficient improvements to eligible facilities. MW&L offers rebates in...

176

DOE ZERH Webinar: Lighting Efficiency | Department of Energy  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy UsageAUDITVehiclesTankless orAChiefAppropriation FYGStrategic HumanDOE WebLighting

177

Energy efficient control of polychromatic solid-state lighting using a sensor network  

E-Print Network [OSTI]

used in the US and most developed economies tends to be consumed in homes and buildings,1 energy and environments using sensors and actuators to mitigate energy usage. Lighting, in particular, accounts for 22Energy efficient control of polychromatic solid-state lighting using a sensor network Matthew

178

Nanodome Solar Cells with Efficient Light Management and Self-Cleaning  

E-Print Network [OSTI]

Nanodome Solar Cells with Efficient Light Management and Self-Cleaning Jia Zhu, Ching-Mei Hsu Nanocone, nanodome, solar cell, light trapping, photovoltaics S olar cells of nanostructures 94305 ABSTRACT Here for the first time, we demonstrate novel nanodome solar cells, which have periodic

Cui, Yi

179

Efficient tunable switch from slow light to fast light in quantum opto-electromechanical system  

E-Print Network [OSTI]

The control of slow and fast light propagation, in the probe transmission in a single experiment, is a challenging task. This type of control can only be achieved through highly nonlinear interactions and additional interfering pathway(s), which is therefore seldom reported. Here, we devise a scheme in which slow light, and a tunable switch from slow light to fast light can be achieved in the probe transmission based on a hybrid setup, which is composed of an optical cavity with two charged nano mechanical resonators (MRs). The two MRs are electrostatically coupled via tunable Coulomb coupling strength ($g_{c}$) making a quantum opto-electromechanical system (QOEMS). The parameter $g_{c}$ that couples the two MRs can be switched on and off by controlling the bias voltages on the MRs, and acts as a tunable switch that allows the propagation of transmitted probe field as slow light ($g_{c} \

M. Javed Akram; Khalid Naseer; Farhan Saif

2015-03-05T23:59:59.000Z

180

High Quality Down Lighting Luminaire with 73% Overall System Efficiency  

SciTech Connect (OSTI)

This report summarizes work to develop a high flux, high efficiency LED-based downlight at OSRAM SYLVANIA under US Department of Energy contract DE-FC26-08NT01582. A new high power LED and electronic driver were developed for these downlights. The LED achieved 100 lumens per watt efficacy and 1700 lumen flux output at a correlated color temperature of 3500K. The driver had 90% electrical conversion efficiency while maintaining excellent power quality with power factor >0.99, and total harmonic distortion <10%. Two styles of downlights using the LED and driver were shown to exceed the project targets for steady-state luminous efficacy and flux of 70 lumens per watt and 1300 lumens, respectively. Compared to similar existing downlights using compact fluorescent or LED sources, these downlights had much higher efficacy at nearly the same luminous flux.

Robert Harrison; Steven C. Allen; Joseph Bernier; Robert Harrison

2010-08-31T23:59:59.000Z

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Efficient bottom cathodes for organic light-emitting devices  

SciTech Connect (OSTI)

Bilayers of aluminum and an alkali fluoride are well-known top cathode contacts for organic light-emitting devices but have never been successfully applied as bottom contacts. We describe a bilayer bottom cathode contact for organic electronic devices based on reversing the well-known top cathode structure such that the aluminum, rather than the alkali fluoride, contacts the organic material. Electron-only devices were fabricated showing enhanced electron injection from this bottom contact. Kelvin probe, x-ray photoelectron spectroscopy experiments, and thermodynamic calculations suggest that the enhancement results from n doping of the organic material by dissociated alkali metals.

Liu Jie; Duggal, Anil R.; Shiang, Joseph J.; Heller, Christian M. [General Electric Global Research, 1 Research Circle, Niskayuna, New York 12309 (United States)

2004-08-02T23:59:59.000Z

182

Lighting Energy Efficiency in Parking Campaign | Department of Energy  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector General Office0-72.pdfGeorgeDoesn't Happen toLeveraging NationalCompositesLighting Energy

183

NREL: News Feature - Light Inspires Energy Efficient Building Design  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the Contributions and AchievementsResearch Staff MaterialsPrintableHP SupercomputerLight

184

Energy Efficiency and Conservation Block Grant Program  

Broader source: Energy.gov (indexed) [DOE]

upgrades, and technology upgrades; 3) LED traffic signal conversion to replace incandescent bulbs to light-emitting diodes. Conditions: Historic preservation clause applies to...

185

Efficiency enhancement in a light-emitting diode with a two-dimensional surface grating photonic crystal  

E-Print Network [OSTI]

Efficiency enhancement in a light-emitting diode with a two-dimensional surface grating photonic 21 November 2003 We demonstrate a light-emitting diode exhibiting 1.7­2.7-fold enhancement in light light emitting diode LED , the ef- ficiency is limited to several percents by a low light extrac- tion

Baba, Toshihiko

186

Light Trapping for High Efficiency Heterojunction Crystalline Si Solar Cells: Preprint  

SciTech Connect (OSTI)

Light trapping plays an important role to achieve high short circuit current density (Jsc) and high efficiency for amorphous/crystalline Si heterojunction solar cells. Si heterojunction uses hydrogenated amorphous Si for emitter and back contact. This structure of solar cell posses highest open circuit voltage of 0.747 V at one sun for c-Si based solar cells. It also suggests that over 25% record-high efficiency is possible with further improvement of Jsc. Light trapping has two important tasks. The first one is to reduce the surface reflectance of light to zero for the solar spectrum that Si has a response. The second one is to increase the effective absorption length to capture all the photon. For Si heterojunction solar cell, surface texturing, anti-reflectance indium tin oxides (ITO) layer at the front and back are the key area to improve the light trapping.

Wang, Q.; Xu, Y.; Iwaniczko, E.; Page, M.

2011-04-01T23:59:59.000Z

187

An Efficient LED System-in-Module for General Lighting Applications  

SciTech Connect (OSTI)

The objective of the project was to realize an LED-based lighting technology platform for general illumination, starting with LED chips, and integrating the necessary technologies to make compact, user-friendly, high-efficiency, energy-saving sources of controlled white (or variable-colored) light. The project is to build the system around the LEDs, and not to work on the LEDs themselves, in order that working products can be introduced soon after the LEDs reach suitable efficiency for mass-production of high-power light sources for general illumination. Because the light sources are intended for general illumination, color must be accurately maintained, requiring feedback control in the electronics. The project objective has been realized and screw base demonstrators, based on the technology developed in the project, have been built.

None

2008-09-14T23:59:59.000Z

188

Microwave generated plasma light source apparatus  

SciTech Connect (OSTI)

A microwave generated plasma light source including a microwave generator, a microwave cavity having a light reflecting member forming at least a portion of the cavity, and a member transparent to light and opaque to microwaves disposed across an opening of the cavity opposite the feeding opening through which the microwave generator is coupled. An electrodeless discharge bulb is disposed at a position in the cavity such that the cavity operates as a resonant cavity at least when the bulb is emitting light. In the bulb is encapsulated at least one discharge light emissive substance. The bulb has a shape and is sufficiently small that the bulb acts substantially as a point light source.

Yoshizawa, K.; Ito, H.; Kodama, H.; Komura, H.; Minowa, Y.

1985-02-05T23:59:59.000Z

189

Enhanced Efficiency of Light-Trapping Nanoantenna Arrays for Thin Film Solar Cells  

E-Print Network [OSTI]

We suggest a novel concept of efficient light-trapping structures for thin-film solar cells based on arrays of planar nanoantennas operating far from plasmonic resonances. The operation principle of our structures relies on the excitation of chessboard-like collective modes of the nanoantenna arrays with the field localized between the neighboring metal elements. We demonstrated theoretically substantial enhancement of solar-cell short-circuit current by the designed light-trapping structure in the whole spectrum range of the solar-cell operation compared to conventional structures employing anti-reflecting coating. Our approach provides a general background for a design of different types of efficient broadband light-trapping structures for thin-film solar-cell technologically compatible with large-area thin-film fabrication techniques.

Simovski, Constantin R; Voroshilov, Pavel M; Guzhva, Michael E; Belov, Pavel A; Kivshar, Yuri S

2013-01-01T23:59:59.000Z

190

Optimization of the Collection Efficiency of a Hexagonal Light Collector using Quadratic and Cubic Bézier Curves  

E-Print Network [OSTI]

Reflective light collectors with hexagonal entrance and exit apertures are frequently used in front of the focal-plane camera of a very-high-energy gamma-ray telescope to increase the collection efficiency of atmospheric Cherenkov photons and reduce the night-sky background entering at large incident angles. The shape of a hexagonal light collector is usually based on Winston's design, which is optimized for only two-dimensional optical systems. However, it is not known whether a hexagonal Winston cone is optimal for the real three-dimensional optical systems of gamma-ray telescopes. For the first time we optimize the shape of a hexagonal light collector using quadratic and cubic B\\'ezier curves. We demonstrate that our optimized designs simultaneously achieve a higher collection efficiency and background reduction rate than traditional designs.

Akira Okumura

2012-06-04T23:59:59.000Z

191

Advanced method for increasing the efficiency of white light quantum dot LEDs  

SciTech Connect (OSTI)

Covering a light-emitting diode (LED) with quantum dots (QDs) can produce a broad spectrum of white light. However, current techniques for applying QDs to LEDs suffer from a high density of defects and a non-uniform distribution of QDs, which, respectively, diminish the efficiency and quality of emitted light. Oak Ridge National Laboratory (ORNL) has the unique capability to thermally anneal QD structures at extremely high power densities for very short durations. This process, called pulse thermal processing (PTP), reduces the number of point defects while maintaining the size and shape of the original QD nanostructure. Therefore, the efficiency of the QD wavelength conversion layer is improved without altering the emission spectrum defined by the size distribution of theQD nanoparticles. The current research uses a thermal model to predict annealing temperatures during PTP and demonstrates up to a 300% increase in photoluminescence for QDs on passive substrates.

Duty, Chad E [ORNL; Bennett, Charlee J C [ORNL; Sabau, Adrian S [ORNL; Jellison Jr, Gerald Earle [ORNL; Boudreaux, Philip R [ORNL; Walker, Steven C [ORNL; Ott, Ronald D [ORNL

2011-01-01T23:59:59.000Z

192

Transportation Energy Futures Series: Potential for Energy Efficiency Improvement Beyond the Light-Duty-Vehicle Sector  

SciTech Connect (OSTI)

Considerable research has focused on energy efficiency and fuel substitution options for light-duty vehicles, while much less attention has been given to medium- and heavy-duty trucks, buses, aircraft, marine vessels, trains, pipeline, and off-road equipment. This report brings together the salient findings from an extensive review of literature on future energy efficiency options for these non-light-duty modes. Projected activity increases to 2050 are combined with forecasts of overall fuel efficiency improvement potential to estimate the future total petroleum and greenhouse gas (GHG) emissions relative to current levels. This is one of a series of reports produced as a result of the Transportation Energy Futures (TEF) project, a Department of Energy-sponsored multi-agency project initiated to pinpoint underexplored strategies for abating GHGs and reducing petroleum dependence related to transportation.

Vyas, A. D.; Patel, D. M.; Bertram, K. M.

2013-03-01T23:59:59.000Z

193

Novel Low Cost Organic Vapor Jet Printing of Striped High Efficiency Phosphorescent OLEDs for White Lighting  

SciTech Connect (OSTI)

In this program, Universal Display Corporation and University of Michigan proposed to integrate three innovative concepts to meet the DOE's Solid State Lighting (SSL) goals: (1) high-efficiency phosphorescent organic light emitting device (PHOLED{trademark}) technology, (2) a white lighting design that is based on a series of red, green and blue OLED stripes, and (3) the use of a novel cost-effective, high rate, mask-less deposition process called organic vapor jet printing (OVJP). Our PHOLED technology offers up to four-times higher power efficiency than other OLED approaches for general lighting. We believe that one of the most promising approaches to maximizing the efficiency of OLED lighting sources is to produce stripes of the three primary colors at such a pitch (200-500 {mu}m) that they appear as a uniform white light to an observer greater than 1 meter (m) away from the illumination source. Earlier work from a SBIR Phase 1 entitled 'White Illumination Sources Using Striped Phosphorescent OLEDs' suggests that stripe widths of less than 500 {mu}m appear uniform from a distance of 1m without the need for an external diffuser. In this program, we intend to combine continued advances in this PHOLED technology with the striped RGB lighting design to demonstrate a high-efficiency, white lighting source. Using this background technology, the team has focused on developing and demonstrating the novel cost-effective OVJP process to fabricate these high-efficiency white PHOLED light sources. Because this groundbreaking OVJP process is a direct printing approach that enables the OLED stripes to be printed without a shadow mask, OVJP offers very high material utilization and high throughput without the costs and wastage associated with a shadow mask (i.e. the waste of material that deposits on the shadow mask itself). As a direct printing technique, OVJP also has the potential to offer ultra-high deposition rates (> 1,000 Angstroms/second) for any size or shaped features. As a result, we believe that this work will lead to the development of a cost-effective manufacturing solution to produce very-high efficiency OLEDs. By comparison to more common ink-jet printing (IJP), OVJP can also produce well-defined patterns without the need to pattern the substrate with ink wells or to dry/anneal the ink. In addition, the material set is not limited by viscosity and solvent solubility. During the program we successfully demonstrated a 6-inch x 6-inch PHOLED lighting panel consisting of fine-featured red, green and blue (R-G-B) stripes (1mm width) using an OVJP deposition system that was designed, procured and installed into UDC's cleanroom as part of this program. This project will significantly accelerate the DOE's ability to meet its 2015 DOE SSL targets of 70-150 lumens/Watt and less than $10 per 1,000 lumens for high CRI lighting index (76-90). Coupled with a low cost manufacturing path through OVJP, we expect that this achievement will enable the DOE to achieve its 2015 performance goals by the year 2013, two years ahead of schedule. As shown by the technical work performed under this program, we believe that OVJP is a very promising technology to produce low cost, high efficacy, color tunable light sources. While we have made significant progress to develop OVJP technology and build a pilot line tool to study basic aspects of the technology and demonstrate a lighting panel prototype, further work needs to be performed before its full potential and commercial viability can be fully assessed.

Mike Hack

2008-12-31T23:59:59.000Z

194

Funding Sustainable Initiatives: Should Williams Implement a Revolving Loan Fund?  

E-Print Network [OSTI]

to replace its incandescent light bulbs with more efficient compact fluorescent (CFL) light bulbs. These light bulbs use 2/3 less energy than #12;Terra 4 standard incandescent bulbs, but they are more

Aalberts, Daniel P.

195

Analysis of federal policy options for improving US lighting energy efficiency: Commercial and residential buildings  

SciTech Connect (OSTI)

The US Department of Energy (DOE) has recognized the opportunity to achieve energy, economic, and environmental benefits by promoting energy-efficient lighting through federal policies, including lighting standards, financial incentives, and information programs. To assist in this process, the Office of Conservation and Renewable Energy`s Office of Codes and Standards invited Lawrence Berkeley Laboratory to assess prospective national impacts for a variety of policy options. Some progress has already been made in developing lighting policies at both the federal and state levels. The US DOE`s Office of Building Technologies has evaluated lighting efficiency incentives as part of its analysis for the National Energy Strategy. Fluorescent and incandescent lamp standards are included in the national Energy Policy Act of 1992 (P.L. 102-486, October 24, 1992). A few states have analyzed or implemented lamp and luminaire standards. Many policy-related issues merit further investigation. For example, there is considerable debate over issues such as mandatory or voluntary standards versus component labeling and other education-oriented strategies. Several different technologies are involved that interact with each other-lamps (incandescent, compact fluorescent, and HID), ballasts (for fluorescent and HID lamps), and fixtures with reflectors and lenses. Control systems and operation patterns must also be considered (timers, automated dimming, or occupancy sensors). Lighting applications are diverse, ranging from offices, restaurants, hallways, hospital operating rooms, to exterior lights. Lighting energy use influences heating and cooling requirements in buildings. Successful lighting system design must also address interactions between architectural design elements and daylighting availability. Proper system installation and ongoing operation and maintenance are crucial. The economic aspects of the preceding points must also be considered for policy making.

Atkinson, B.A.; McMahon, J.E.; Mills, E.; Chan, P.; Chan, T.W.; Eto, J.H.; Jennings, J.D.; Koomey, J.G.; Lo, K.W.; Lecar, M.; Price, L.; Rubinstein, F.; Sezgen, O.; Wenzel, T.

1992-12-01T23:59:59.000Z

196

Analysis of federal policy options for improving US lighting energy efficiency: Commercial and residential buildings  

SciTech Connect (OSTI)

The US Department of Energy (DOE) has recognized the opportunity to achieve energy, economic, and environmental benefits by promoting energy-efficient lighting through federal policies, including lighting standards, financial incentives, and information programs. To assist in this process, the Office of Conservation and Renewable Energy's Office of Codes and Standards invited Lawrence Berkeley Laboratory to assess prospective national impacts for a variety of policy options. Some progress has already been made in developing lighting policies at both the federal and state levels. The US DOE's Office of Building Technologies has evaluated lighting efficiency incentives as part of its analysis for the National Energy Strategy. Fluorescent and incandescent lamp standards are included in the national Energy Policy Act of 1992 (P.L. 102-486, October 24, 1992). A few states have analyzed or implemented lamp and luminaire standards. Many policy-related issues merit further investigation. For example, there is considerable debate over issues such as mandatory or voluntary standards versus component labeling and other education-oriented strategies. Several different technologies are involved that interact with each other-lamps (incandescent, compact fluorescent, and HID), ballasts (for fluorescent and HID lamps), and fixtures with reflectors and lenses. Control systems and operation patterns must also be considered (timers, automated dimming, or occupancy sensors). Lighting applications are diverse, ranging from offices, restaurants, hallways, hospital operating rooms, to exterior lights. Lighting energy use influences heating and cooling requirements in buildings. Successful lighting system design must also address interactions between architectural design elements and daylighting availability. Proper system installation and ongoing operation and maintenance are crucial. The economic aspects of the preceding points must also be considered for policy making.

Atkinson, B.A.; McMahon, J.E.; Mills, E.; Chan, P.; Chan, T.W.; Eto, J.H.; Jennings, J.D.; Koomey, J.G.; Lo, K.W.; Lecar, M.; Price, L.; Rubinstein, F.; Sezgen, O.; Wenzel, T.

1992-12-01T23:59:59.000Z

197

Income Tax Deduction for Energy-Efficient Products  

Broader source: Energy.gov [DOE]

This incentive is available for dishwashers, clothes washers, air conditioners, ceiling fans, compact fluorescent light bulbs, dehumidifiers, programmable thermostats or refrigerators that meet or...

198

Global Potential of Energy Efficiency Standards and Labeling Programs  

E-Print Network [OSTI]

lighting (replacement of incandescent lamps with CFLs) withof each type of lamp: incandescent; fluorescent tubes; andless consumptive than incandescent bulbs. Second, it impacts

McNeil, Michael A

2008-01-01T23:59:59.000Z

199

Residential Electricity Demand in China -- Can Efficiency Reverse the Growth?  

E-Print Network [OSTI]

2000: Lighting Type Incandescent Fluorescent CFL Percentagescenario, we assume that incandescent bulbs are graduallyW 60W 15W Fluorescent Lamps Incandescent Lamps CFL We then

Letschert, Virginie

2010-01-01T23:59:59.000Z

200

Life cycle assessment of buildings technologies: High-efficiency commercial lighting and residential water heaters  

SciTech Connect (OSTI)

In this study the life cycle emissions and energy use are estimated for two types of energy technologies. The first technology evaluated is the sulfur lamp, a high-efficiency lighting system under development by the US Department of Energy (DOE) and Fusion Lighting, the inventor of the technology. The sulfur lamp is compared with conventional metal halide high-intensity discharge lighting systems. The second technology comparison is between standard-efficiency and high-efficiency gas and electric water heaters. In both cases the life cycle energy use and emissions are presented for the production of an equivalent level of service by each of the technologies. For both analyses, the energy use and emissions from the operation of the equipment are found to dominate the life cycle profile. The life cycle emissions for the water heating systems are much more complicated. The four systems compared include standard- and high-efficiency gas water heaters, standard electric resistance water heaters, and heat pump water heaters.

Freeman, S.L.

1997-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Effect of carbazoleoxadiazole excited-state complexes on the efficiency of dye-doped light-emitting diodes  

E-Print Network [OSTI]

Effect of carbazole­oxadiazole excited-state complexes on the efficiency of dye-doped light a profound effect on the external quantum efficiency of dye-doped organic light-emitting diodes employing the matrix to the dye. Single-layer devices doped with either coumarin 47 C47 , coumarin 6 C6 , or nile red

202

Efficiency and stray light measurements and calculations of diffraction gratings for the ALS  

SciTech Connect (OSTI)

Water cooled gratings manufactured for spherical grating monochromators of the Advanced Light Source beamlines 7.0, 8.0 and 9.0 were measured with the laser plasma source and reflectometer in the Center for X-ray Optics at LBL. The square-wave gratings are ion-milled into the polished electroless nickel surface after patterning by holographic photolithography. Absolute efficiency data are compared with exact electromagnetic theory calculation. Inter-order stray light and groove depths can be estimated from the measurements.

McKinney, W.R.; Mossessian, D.; Gullikson, E.; Heimann, P.

1994-07-01T23:59:59.000Z

203

Energy 101: Lighting Choices | Department of Energy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

in your home to energy-saving incandescent, compact fluorescent lamp (CFL), or light emitting diode (LED) bulbs could save you about 50 per year. For more information on lighting...

204

Efficiency of energy transfer in a light-harvesting system under quantum coherence  

E-Print Network [OSTI]

We investigate the role of quantum coherence in the efficiency of excitation transfer in a ring-hub arrangement of interacting two-level systems, mimicking a light-harvesting antenna connected to a reaction center as it is found in natural photosynthetic systems. By using a quantum jump approach, we demonstrate that in the presence of quantum coherent energy transfer and energetic disorder, the efficiency of excitation transfer from the antenna to the reaction center depends intimately on the quantum superposition properties of the initial state. In particular, we find that efficiency is sensitive to symmetric and asymmetric superposition of states in the basis of localized excitations, indicating that initial state properties can be used as a efficiency control parameter at low temperatures.

Alexandra Olaya-Castro; Chiu Fan Lee; Francesca Fassioli Olsen; Neil F. Johnson

2008-04-16T23:59:59.000Z

205

Vacuum-free lamination of low work function cathode for efficient solution-processed organic light-emitting diodes  

E-Print Network [OSTI]

-coated organic light-emitting diode is transferred from a soft polydimethylsiloxane (PDMS) mold by lamination, or blade coating [1,2] for organic light emitting diode (OLED) as well as solar cell. The top electrodeVacuum-free lamination of low work function cathode for efficient solution-processed organic light-emitting

Meng, Hsin-Fei

206

Junction temperature, spectral shift, and efficiency in GaInN-based blue and green light emitting diodes  

E-Print Network [OSTI]

Keywords: GaInN/GaN Light emitting diode temperature Micro-Raman Photoluminescence Electroluminescence well light emitting diode (LED) dies is analyzed by micro-Raman, photoluminescence, cathodoluminescenceJunction temperature, spectral shift, and efficiency in GaInN-based blue and green light emitting

Wetzel, Christian M.

207

High Efficiency Integrated Package  

SciTech Connect (OSTI)

Solid-state lighting based on LEDs has emerged as a superior alternative to inefficient conventional lighting, particularly incandescent. LED lighting can lead to 80 percent energy savings; can last 50,000 hours – 2-50 times longer than most bulbs; and contains no toxic lead or mercury. However, to enable mass adoption, particularly at the consumer level, the cost of LED luminaires must be reduced by an order of magnitude while achieving superior efficiency, light quality and lifetime. To become viable, energy-efficient replacement solutions must deliver system efficacies of ? 100 lumens per watt (LPW) with excellent color rendering (CRI > 85) at a cost that enables payback cycles of two years or less for commercial applications. This development will enable significant site energy savings as it targets commercial and retail lighting applications that are most sensitive to the lifetime operating costs with their extended operating hours per day. If costs are reduced substantially, dramatic energy savings can be realized by replacing incandescent lighting in the residential market as well. In light of these challenges, Cree proposed to develop a multi-chip integrated LED package with an output of > 1000 lumens of warm white light operating at an efficacy of at least 128 LPW with a CRI > 85. This product will serve as the light engine for replacement lamps and luminaires. At the end of the proposed program, this integrated package was to be used in a proof-of-concept lamp prototype to demonstrate the component’s viability in a common form factor. During this project Cree SBTC developed an efficient, compact warm-white LED package with an integrated remote color down-converter. Via a combination of intensive optical, electrical, and thermal optimization, a package design was obtained that met nearly all project goals. This package emitted 1295 lm under instant-on, room-temperature testing conditions, with an efficacy of 128.4 lm/W at a color temperature of ~2873K and 83 CRI. As such, the package’s performance exceeds DOE’s warm-white phosphor LED efficacy target for 2013. At the end of the program, we assembled an A19 sized demonstration bulb housing the integrated package which met Energy Star intensity variation requirements. With further development to reduce overall component cost, we anticipate that an integrated remote converter package such as developed during this program will find application in compact, high-efficacy LED-based lamps, particularly those requiring omnidirectional emission.

Ibbetson, James

2013-09-15T23:59:59.000Z

208

LED lamp or bulb with remote phosphor and diffuser configuration with enhanced scattering properties  

DOE Patents [OSTI]

An LED lamp or bulb is disclosed that comprises a light source, a heat sink structure and an optical cavity. The optical cavity comprises a phosphor carrier having a conversions material and arranged over an opening to the cavity. The phosphor carrier comprises a thermally conductive transparent material and is thermally coupled to the heat sink structure. An LED based light source is mounted in the optical cavity remote to the phosphor carrier with light from the light source passing through the phosphor carrier. A diffuser dome is included that is mounted over the optical cavity, with light from the optical cavity passing through the diffuser dome. The properties of the diffuser, such as geometry, scattering properties of the scattering layer, surface roughness or smoothness, and spatial distribution of the scattering layer properties may be used to control various lamp properties such as color uniformity and light intensity distribution as a function of viewing angle.

Tong, Tao; Le Toquin, Ronan; Keller, Bernd; Tarsa, Eric; Youmans, Mark; Lowes, Theodore; Medendorp, Jr., Nicholas W; Van De Ven, Antony; Negley, Gerald

2014-11-11T23:59:59.000Z

209

Energy Efficiency and Conservation Block Grant Program  

Broader source: Energy.gov (indexed) [DOE]

light bulb retrofits, and 5) incandescent traffic signal replacement with light-emitting diode technology Conditions: None Categorical Exclusion(s) Applied: A9, A11, B1.32,...

210

Metacapacitors for LED Lighting: Metacapacitors  

SciTech Connect (OSTI)

ADEPT Project: The CUNY Energy Institute is developing less expensive, more efficient, smaller, and longer-lasting power converters for energy-efficient LED lights. LEDs produce light more efficiently than incandescent lights and last significantly longer than compact fluorescent bulbs, but they require more sophisticated power converter technology, which increases their cost. LEDs need more sophisticated converters because they require a different type of power (low voltage direct current, or DC) than what's generally supplied by power outlets. The CUNY Energy Institute is developing sophisticated power converters for LEDs that contain capacitors made from new, nanoscale materials. Capacitors are electrical components that are used to store energy. CUNY's unique capacitors are configured with advanced power circuits to more efficiently control and convert power to the LED lighting source. They also eliminate the need for large magnetic components, instead relying on networks of capacitors that can be easily printed on plastic substrate. CUNY's prototype LED power converter already meets DOE's 2020 projections for the energy efficiency of LED power converters.

None

2010-09-02T23:59:59.000Z

211

The History of the Light Bulb | Department of Energy  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy UsageAUDITVehiclesTankless or Demand-Type Water Heaters TanklessDepartment ofTheTheThe

212

Westinghouse and Fuzhou Permitted to Restart Distribution of Light Bulb  

Broader source: Energy.gov (indexed) [DOE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment of Energy WhileTanklessLES' URENCO-USAWestern

213

Revolutionary Method for Increasing the Efficiency of White Light Quantum Dot LEDs  

SciTech Connect (OSTI)

Covering a light-emitting diode (LED) with quantum dots (QDs) can produce a broad spectrum of white light. However, current techniques for applying QDs to LEDs suffer from a high density of defects and a non-uniform distribution of QDs, which respec-tively diminish the efficiency and quality of emitted light. Oak Ridge National Laboratory (ORNL) has the unique capability to thermally anneal QD structures at extremely high power densities for very short durations. This process, called pulse thermal proc-essing (PTP), reduces the number of point defects while main-taining the size and shape of the original QD nanostructure. Therefore, the efficiency of the QD wavelength conversion layer is improved without altering the emission spectrum defined by the size distribution of the quantum dot nanoparticles. The cur-rent research uses a thermal model to predict annealing tempera-tures during PTP and demonstrates up to a 300% increase in pho-toluminescence for QDs on passive substrates

Duty, Chad E [ORNL; Bennett, Charlee J C [ORNL; Sabau, Adrian S [ORNL; Jellison Jr, Gerald Earle [ORNL; Boudreaux, Philip R [ORNL; Walker, Steven C [ORNL; Ott, Ronald D [ORNL

2011-01-01T23:59:59.000Z

214

Efficiency Improvement of Nitride-Based Solid State Light Emitting Materials -- CRADA Final Report  

SciTech Connect (OSTI)

The development of In{sub x}Ga{sub 1-x} N/GaN thin film growth by Molecular Beam Epitaxy has opened a new route towards energy efficient solid-state lighting. Blue and green LED's became available that can be used to match the whole color spectrum of visible light with the potential to match the eye response curve. Moreover, the efficiency of such devices largely exceeds that of incandescent light sources (tungsten filaments) and even competes favorably with lighting by fluorescent lamps. It is, however, also seen in Figure 1 that it is essential to improve on the luminous performance of green LED's in order to mimic the eye response curve. This lack of sufficiently efficient green LED's relates to particularities of the In{sub x}Ga{sub 1-x}N materials system. This ternary alloy system is polar and large strain is generated during a lattice mismatched thin film growth because of the significantly different lattice parameters between GaN and InN and common substrates such as sapphire. Moreover, it is challenging to incorporate indium into GaN at typical growth temperatures because a miscibility gap exists that can be modified by strain effects. As a result a large parameter space needs exploration to optimize the growth of In{sub x}Ga{sub 1-x}N and to date it is unclear what the detailed physical processes are that affect device efficiencies. In particular, an inhomogeneous distribution indium in GaN modifies the device performance in an unpredictable manner. As a result technology is pushed forward on a trial and error basis in particular in Asian countries such as Japan and Korea, which dominate the market and it is desirable to strengthen the competitiveness of the US industry. This CRADA was initiated to help Lumileds Lighting/USA boosting the performance of their green LED's. The tasks address the distribution of the indium atoms in the active area of their blue and green LED's and its relation to internal and external quantum efficiencies. Procedures to measure the indium distribution with near atomic resolution were developed and applied to test samples and devices that were provided by Lumilids. Further, the optical performance of the device materials was probed by photoluminescence, electroluminescence and time resolved optical measurements. Overall, the programs objective is to provide a physical basis for the development of a simulation program that helps making predictions to improve the growth processes such that the device efficiency can be increased to about 20%. Our study addresses all proposed aspects successfully. Carrier localization, lifetime and recombination as well as the strain-induced generation of electric fields were characterized and modeled. Band gap parameters and their relation to the indium distribution were characterized and modeled. Electron microscopy was developed as a unique tool to measure the formation of indium clusters on a nanometer length scale and it was demonstrated that strain induced atom column displacements can reliably be determined in any materials system with a precision that approaches 2 pm. The relation between the local indium composition x and the strain induced lattice constant c(x) in fully strained In{sub x}Ga{sub 1-x}N quantum wells was found to be: c(x) = 0.5185 + {alpha}x with {alpha} = 0.111 nm. It was concluded that the local indium concentration in the final product can be modulated by growth procedures in a predictable manner to favorably affect external quantum efficiencies that approached target values and that internal quantum efficiencies exceeded them.

Kisielowski, Christian; Weber, Eicke

2010-05-13T23:59:59.000Z

215

High efficiency light source using solid-state emitter and down-conversion material  

DOE Patents [OSTI]

A light emitting apparatus includes a source of light for emitting light; a down conversion material receiving the emitted light, and converting the emitted light into transmitted light and backward transmitted light; and an optic device configured to receive the backward transmitted light and transfer the backward transmitted light outside of the optic device. The source of light is a semiconductor light emitting diode, a laser diode (LD), or a resonant cavity light emitting diode (RCLED). The down conversion material includes one of phosphor or other material for absorbing light in one spectral region and emitting light in another spectral region. The optic device, or lens, includes light transmissive material.

Narendran, Nadarajah (Clifton Park, NY); Gu, Yimin (Troy, NY); Freyssinier, Jean Paul (Troy, NY)

2010-10-26T23:59:59.000Z

216

Commercial Lighting and LED Lighting Incentives  

Broader source: Energy.gov [DOE]

Incentives for energy efficient commercial lighting equipment as well as commercial LED lighting equipment are available to businesses under the Efficiency Vermont Lighting and LED Lighting...

217

Innovative Development of Next Generation and Energy Efficient Solid State Light Sources for General Illumination  

SciTech Connect (OSTI)

This two year program resulted in a novel broadband spectrally dynamic solid state illumination source (BSDLED) that uses a dual wavelength light emitting diode (LED) and combinations of phosphors to create a broadband emission that is real-time controllable. Four major focuses of this work were as follows: (1) creation of a two terminal dual wavelength LED with control of the relative intensities of the two emission peaks, (2) bandgap modeling of the two terminal dual LED to explain operation based on the doping profile, (3) novel use of phosphor combinations with dual LEDs to create a broadband spectral power distribution that can be varied to mimic a blackbody radiator over a certain range and (4) investigation of novel doping schemes to create tunnel junctions or equivalent buried current spreading layers in the III-nitrides. Advances were achieved in each of these four areas which could lead to more efficient solid state light sources with greater functionality over existing devices. The two-terminal BSDLED is an important innovation for the solid-state lighting industry as a variable spectrum source. A three-terminal dual emitter was also investigated and appears to be the most viable approach for future spectrally dynamic solid state lighting sources. However, at this time reabsorption of emission between the two active regions limits the usefulness of this device for illumination applications.

Ian Ferguson

2006-07-31T23:59:59.000Z

218

How Many CASTLE Bulbs Would You Need To Match the Brightness of the Sun?  

E-Print Network [OSTI]

;Suppose that you have two household incandescent bulbs: one is labeled "60W," the other "100W." If you try incandescent bulb and a 9W fluorescent bulb. Which one makes your room brighter? It's not what you might expect... in fact, they look about the same! The incandescent bulb emits a broad spectrum of visible and infrared

Collar, Juan I.

219

ZnO PN Junctions for Highly-Efficient, Low-Cost Light Emitting Diodes  

SciTech Connect (OSTI)

By 2015, the US Department of Energy has set as a goal the development of advanced solid state lighting technologies that are more energy efficient, longer lasting, and more cost-effective than current technology. One approach that is most attractive is to utilize light-emitting diode technologies. Although III-V compound semiconductors have been the primary focus in pursuing this objective, ZnO-based materials present some distinct advantages that could yield success in meeting this objective. As with the nitrides, ZnO is a direct bandgap semiconductor whose gap energy (3.2 eV) can be tuned from 3.0 to 4 eV with substitution of Mg for higher bandgap, Cd for lower bandgap. ZnO has an exciton binding energy of 60 meV, which is larger than that for the nitrides, indicating that it should be a superior light emitting semiconductor. Furthermore, ZnO thin films can be deposited at temperatures on the order of 400-600 C, which is significantly lower than that for the nitrides and should lead to lower manufacturing costs. It has also been demonstrated that functional ZnO electronic devices can be fabricated on inexpensive substrates, such as glass. Therefore, for the large-area photonic application of solid state lighting, ZnO holds unique potential. A significant impediment to exploiting ZnO in light-emitting applications has been the absence of effective p-type carrier doping. However, the recent realization of acceptor-doped ZnO material overcomes this impediment, opening the door to ZnO light emitting diode development In this project, the synthesis and properties of ZnO-based pn junctions for light emitting diodes was investigated. The focus was on three issues most pertinent to realizing a ZnO-based solid state lighting technology, namely (1) achieving high p-type carrier concentrations in epitaxial and polycrystalline films, (2) realizing band edge emission from pn homojunctions, and (3) investigating pn heterojunction constructs that should yield efficient light emission. The project engaged established expertise at the University of Florida in ZnO film growth (D. Norton), device fabrication (F. Ren) and wide bandgap photonics (S. Pearton). It addressed p-type doping and junction formation in (Zn,Mg)O alloy thin films. The project employed pulsed laser deposition for film growth. The p-type dopant of interest was primarily phosphorus, given the recent results in our laboratory and elsewhere that this anions can yield p-type ZnO-based materials. The role of Zn interstitials, oxygen vacancies, and/or hydrogen complexes in forming compensating shallow donor levels imposes the need to simultaneously consider the role of in situ and post-growth processing conditions. Temperature-dependent Hall, Seebeck, C-V, and resistivity measurements was used to determine conduction mechanisms, carrier type, and doping. Temperature-dependent photoluminescence was used to determine the location of the acceptor level, injection efficiency, and optical properties of the structures. X-ray diffraction will used to characterize film crystallinity. Using these materials, the fabrication and characterization of (Zn,Mg)O pn homojunction and heterojunction devices was pursued. Electrical characterization of the junction capacitance and I-V behavior was used to extract junction profile and minority carrier lifetime. Electroluminescence from biased junctions was the primary property of interest.

David P. Norton; Stephen Pearton; Fan Ren

2007-09-30T23:59:59.000Z

220

Internal efficiency of InGaN light-emitting diodes: Beyond a quasiequilibrium model  

SciTech Connect (OSTI)

We propose a model to better investigate InGaN light-emitting diode (LED) internal efficiency by extending beyond the usual total carrier density rate equation approach. To illustrate its capability, the model is applied to study intrinsic performance differences between violet and green LEDs. The simulations show performance differences, at different current densities and temperatures, arising from variations in spontaneous emission and heat loss rates. By tracking the momentum-resolved carrier populations, these rate changes are, in turn, traced to differences in bandstructure and plasma heating. The latter leads to carrier distributions that deviate from the quasiequilibrium ones at lattice temperature.

Chow, Weng W.; Crawford, Mary H.; Tsao, Jeffrey Y.; Kneissl, Michael

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Philips Light Sources & Electronics is Developing an Efficient, Smaller, Cost-Effective Family of LED Drivers  

Broader source: Energy.gov [DOE]

With the help of DOE funding, Philips Light Sources & Electronics is developing a new family of LED drivers that are more efficient and cost-effective as well as smaller in size than currently available drivers. The new drivers are switch-mode power supplies that are similar to today's drivers, but with an improved design. In addition, they have a different topology—boost plus LLC—for wattages of 40W and above, but they retain the commonly used flyback topology at lower wattages.

222

Fabrication of color tunable organic light-emitting diodes by an alignment free mask patterning method  

E-Print Network [OSTI]

that of the incandescent bulb and comparable with that of the fluorescent tube. OLEDs are a true sur- face/area lighting

223

Dye-Sentitized Solar Cells (DSSCs) are an emerging low-cost third generation photovoltaic technology particularly suited for efficient light-  

E-Print Network [OSTI]

light-to -electricity conversion efficiency in early implementations under AM1.5 solar light. EasyDye-Sentitized Solar Cells (DSSCs) are an emerging low-cost third generation photovoltaic technology particularly suited for efficient light- to-electricity conversion in indoors low-light

224

Reducing Barriers To The Use of High-Efficiency Lighting Systems  

SciTech Connect (OSTI)

With funding from the U.S. Department of Energy (DOE), the Lighting Research Center (LRC) at Rensselaer Polytechnic Institute completed the four-year research project, Reducing Barriers to the Use of High-Efficiency Lighting Systems. The initial objectives were: (1) identifying barriers to widespread penetration of lighting controls in commercial/industrial (C/I) applications that employ fluorescent lamp technologies, and (2) making recommendations to overcome these barriers. The addition of a fourth year expanded the original project objectives to include an examination of the impact on fluorescent lamps from dimming utilizing different lamp electrode heating and dimming ratios. The scope of the project was narrowed to identify barriers to the penetration of lighting controls into commercial-industrial (C/I) applications that employ fluorescent lamp technologies, and to recommend means for overcoming these barriers. Working with lighting manufacturers, specifiers, and installers, the project identified technological and marketing barriers to the widespread use of lighting controls, specifically automatic-off controls, occupancy sensors, photosensors, dimming systems, communication protocols and load-shedding ballasts. The primary barriers identified include cost effectiveness of lighting controls to the building owner, lack of standard communication protocols to allow different part of the control system to communicate effectively, and installation and commissioning issues. Overcoming the identified barriers requires lighting control products on the market to achieve three main goals: (1) Achieve sufficient functionality to meet the key requirements of their main market. (2) Allow significant cost reduction compared to current market standard systems. Cost should consider: hardware capital cost including wiring, design time required by the specifier and the control system manufacturer, installation time required by the electrician, and commissioning time and remedial time required by the electrician and end user. (3) Minimize ongoing perceived overhead costs and inconvenience to the end user, or in other words, systems should be simple to understand and use. In addition, we believe that no lighting controls solution is effective or acceptable unless it contributes to, or does not compromise, the following goals: (1) Productivity--Planning, installation, commissioning, maintenance, and use of controls should not decrease business productivity; (2) Energy savings--Lighting controls should save significant amounts of energy and money in relation to the expense involved in using them (acceptable payback period); and/or (3) Reduced power demand--Society as a whole should benefit from the lowered demand for expensive power and for more natural resources. Discussions of technology barriers and developments are insufficient by themselves to achieve higher penetration of lighting controls in the market place. Technology transfer efforts must play a key role in gaining market acceptance. The LRC developed a technology transfer model to better understand what actions are required and by whom to move any technology toward full market acceptance.

Peter Morante

2005-12-31T23:59:59.000Z

225

Analysis of Minimum Efficiency Performance Standards for Residential General Service Lighting in Chile  

E-Print Network [OSTI]

Standard for Residential Lighting in Chile, 2010 USResidential General Service Lighting in Chile Virginie E.focus on a regulation for lighting that would ban the sale

Letschert, Virginie E.

2012-01-01T23:59:59.000Z

226

Solution Processed Tungsten Oxide Interfacial Layer for Efficient Hole-Injection in Quantum Dot Light-Emitting Diodes  

E-Print Network [OSTI]

2/2014 Solution Processed Tungsten Oxide Interfacial Layer for Efficient Hole-Injection in Quantum Layer for Efficient Hole-Injection in Quantum Dot Light- Emitting Diodes Xuyong Yang, Evren Mutlugun-based devices, the organic interfacial buffer layers have inferior thermal stability. Efforts to replace PEDOT

Demir, Hilmi Volkan

227

High voltage ignition of high pressure microwave powered UV light sources  

SciTech Connect (OSTI)

Industrial microwave powered (electrodeless) light sources have been limited to quiescent pressures of {approximately}300 Torr of buffer gas and metal-halide fills. The predominant reason for such restrictions has been the inability to microwave ignite the plasma due to the collisionality of higher pressure fills and/or the electronegativity of halide bulb chemistries. Commercially interesting bulb fills require electric fields for ionization that are often large multiples of the breakdown voltage for air. Many auxiliary ignition methods are evaluated for efficiency and practicality before the choice of a high-voltage system with a retractable external electrode. The scheme utilizes a high voltage pulse power supply and a novel field emission source. Acting together they create localized condition of pressure reduction and high free electron density. This allows the normal microwave fields to drive this small region into avalanche, ignite the bulb, and heat the plasma to its operating point (T{sub e} {approx} 0.5 eV). This process is currently being used in a new generation of lamps, which are using multi-atmospheric excimer laser chemistries and pressure and constituent enhanced metal-halide systems. At the present time, production prototypes produce over 900 W of radiation in a 30 nm band, centered at 308 nm. Similarly, these prototypes when loaded with metal-halide bulb fills produce over 1 kW of radiation in 30 nm wide bands, centered about the wavelength of interest.

Frank, J.D.; Cekic, M.; Wood, C.H. [Fusion U.V. Curing Systems Corp., Gaithersburg, MD (United States)

1997-12-31T23:59:59.000Z

228

Highly efficient greenish-blue platinum-based phosphorescent organic light-emitting diodes on a high triplet energy platform  

SciTech Connect (OSTI)

We have demonstrated high-efficiency greenish-blue phosphorescent organic light-emitting diodes (PHOLEDs) based on a dimesitylboryl-functionalized C^N chelate Pt(II) phosphor, Pt(m-Bptrz)(t-Bu-pytrz-Me). Using a high triplet energy platform and optimized double emissive zone device architecture results in greenish-blue PHOLEDs that exhibit an external quantum efficiency of 24.0% and a power efficiency of 55.8?lm/W. This record high performance is comparable with that of the state-of-the-art Ir-based sky-blue organic light-emitting diodes.

Chang, Y. L., E-mail: yilu.chang@mail.utoronto.ca; Gong, S., E-mail: sgong@chem.utoronto.ca; White, R.; Lu, Z. H., E-mail: zhenghong.lu@utoronto.ca [Department of Materials Science and Engineering, University of Toronto, 184 College St., Toronto, Ontario M5S 3E4 (Canada); Wang, X.; Wang, S., E-mail: wangs@chem.queensu.ca [Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario K7L 3N6 (Canada); Yang, C. [Department of Chemistry, Wuhan University, Wuhan 430072 (China)

2014-04-28T23:59:59.000Z

229

Lighting the Way to Serious Savings | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

lighting, you can take a big bite out of that cost. Upgrading 15 of the inefficient incandescent light bulbs in your home could save you about 50 per year. Plus, most of the...

230

Choosing Energy-Saving Lighting Products Saves You Money | Department...  

Broader source: Energy.gov (indexed) [DOE]

about 1.50 to light the same space with a compact fluorescent lamp (CFL) or light emitting diode (LED). That's 4.50 in savings each year per bulb. Over their lifetime,...

231

An ambipolar phosphine oxide-based host for high power efficiency blue phosphorescent organic light emitting devices  

SciTech Connect (OSTI)

We report blue electrophosphorescent organic light emitting devices (OLEDs) with a new ambipolar host material, 4-(diphenylphosphoryl)-N,N-diphenylaniline (HM-A1), doped with the blue phosphor iridium (III) bis[(4,6-difluorophenyl)-pyridinato-N,C2’]picolinate (FIrpic). The ambipolar nature of the host was verified using single carrier devices. The power efficiency of devices that employed 2,8-bis(diphenylphosphoryl)dibenzothiophene (PO15) as the electron transport layer showed optimized device performance when the electron transport layer thickness was 500 Ĺ, giving a peak power efficiency of 46 lm/W (corresponding external quantum efficiency of 17.1%). The external quantum efficiency and power efficiency at the brightness of 800 Cd/m2 were measured with no light outcoupling enhancement and found to be 15.4% and 26 lm/W, respectively.

Polikarpov, Evgueni; Swensen, James S.; Chopra, Neetu; So, Franky; Padmaperuma, Asanga B.

2009-06-01T23:59:59.000Z

232

Energy-efficiency labels and standards: A guidebook for appliances, equipment and lighting  

SciTech Connect (OSTI)

Energy-performance improvements in consumer products are an essential element in any government's portfolio of energy-efficiency and climate change mitigation programs. Governments need to develop balanced programs, both voluntary and regulatory, that remove cost-ineffective, energy-wasting products from the marketplace and stimulate the development of cost-effective, energy-efficient technology. Energy-efficiency labels and standards for appliances, equipment, and lighting products deserve to be among the first policy tools considered by a country's energy policy makers. The U.S. Agency for International Development (USAID) and the United Nations Foundation (UNF) recognize the need to support policy makers in their efforts to implement energy-efficiency standards and labeling programs and have developed this guidebook, together with the Collaborative Labeling and Appliance Standards Program (CLASP), as a primary reference. This guidebook was prepared over the course of the past year with significant contribution from the authors and reviewers mentioned previously. Their diligent participation has made this the international guidance tool it was intended to be. The lead authors would also like to thank the following individuals for their support in the development, production, and distribution of the guidebook: Marcy Beck, Elisa Derby, Diana Dhunke, Ted Gartner, and Julie Osborn of Lawrence Berkeley National Laboratory as well as Anthony Ma of Bevilacqua-Knight, Inc. This guidebook is designed as a manual for government officials and others around the world responsible for developing, implementing, enforcing, monitoring, and maintaining labeling and standards-setting programs. It discusses the pros and cons of adopting energy-efficiency labels and standards and describes the data, facilities, and institutional and human resources needed for these programs. It provides guidance on the design, development, implementation, maintenance, and evaluation of the programs and on the design of the labels and standards themselves. In addition, it directs the reader to references and other resources likely to be useful in conducting the activities described and includes a chapter on energy policies and programs that complement appliance efficiency labels and standards. This guidebook attempts to reflect the essential framework of labeling and standards programs. It is the intent of the authors and sponsors to distribute copies of this book worldwide at no charge for the general public benefit. The guidebook is also available on the web at www.CLASPonline.org and can be downloaded to be used intact or piecemeal for whatever beneficial purposes readers may conceive.

McMahon, James E.; Wiel, Stephen

2001-02-16T23:59:59.000Z

233

Development of large volume double ring penning plasma discharge source for efficient light emissions  

SciTech Connect (OSTI)

In this paper, the development of large volume double ring Penning plasma discharge source for efficient light emissions is reported. The developed Penning discharge source consists of two cylindrical end cathodes of stainless steel having radius 6 cm and a gap 5.5 cm between them, which are fitted in the top and bottom flanges of the vacuum chamber. Two stainless steel anode rings with thickness 0.4 cm and inner diameters 6.45 cm having separation 2 cm are kept at the discharge centre. Neodymium (Nd{sub 2}Fe{sub 14}B) permanent magnets are physically inserted behind the cathodes for producing nearly uniform magnetic field of {approx}0.1 T at the center. Experiments and simulations have been performed for single and double anode ring configurations using helium gas discharge, which infer that double ring configuration gives better light emissions in the large volume Penning plasma discharge arrangement. The optical emission spectroscopy measurements are used to complement the observations. The spectral line-ratio technique is utilized to determine the electron plasma density. The estimated electron plasma density in double ring plasma configuration is {approx}2 Multiplication-Sign 10{sup 11} cm{sup -3}, which is around one order of magnitude larger than that of single ring arrangement.

Prakash, Ram; Vyas, Gheesa Lal; Jain, Jalaj; Prajapati, Jitendra; Pal, Udit Narayan [Microwave Tubes Division, CSIR-Central Electronics and Engineering Research Institute, Pilani-333031 (India); Chowdhuri, Malay Bikas; Manchanda, Ranjana [Institute for Plasma Research, Bhat, Gandhinagar-382428 (India)

2012-12-15T23:59:59.000Z

234

Sailing into the Mainstream of Energy and Water Efficiency, Affordably...  

Broader source: Energy.gov (indexed) [DOE]

I entered the room, I checked all of the light fixtures (yes, I'm odd in that way). Incandescent light bulbs were in all the sockets. However, when I flushed the toilet, I heard...

235

CLTC is a not-for-profit research, development and demonstration facility leading innovations in energy-efficient lighting and daylighting technologies.  

E-Print Network [OSTI]

in energy-efficient lighting and daylighting technologies. Collaborating with partners in government common ways CLTC utilizes funding to advance the science of energy-efficient lighting and daylighting and field test emerging lighting and daylighting technologies. Demonstrations help vet the performance

California at Davis, University of

236

Thin-film silicon triple-junction solar cell with 12.5% stable efficiency on innovative flat light-scattering substrate  

E-Print Network [OSTI]

Thin-film silicon triple-junction solar cell with 12.5% stable efficiency on innovative flat light://jap.aip.org/about/rights_and_permissions #12;Thin-film silicon triple-junction solar cell with 12.5% stable efficiency on innovative flat light require light-trapping schemes that are predominantly based on depositing the solar cells on rough

Psaltis, Demetri

237

Efficient optical absorption enhancement in organic solar cells by using a 2-dimensional periodic light trapping structure  

SciTech Connect (OSTI)

We have investigated the effects induced by periodic nanosphere arrays on the performance of organic solar cells (OSCs). Two-dimensional periodic arrays of polystyrene nanospheres were formed by using a colloidal lithography method together with plasma etching to trim down the size to various degrees on the substrates of OSCs. It is found that the devices prepared on such substrates can have improved light harvesting, resulting in as high as 35% enhancement in power conversion efficiency over that of the reference devices. The measured external quantum efficiency and finite-difference time-domain simulation reveal that the controlled periodic morphology of the substrate can efficiently increase light scattering in the device and thus enhance the absorption of incident light.

Zu, Feng-Shuo [Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123 (China); Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR (China); Shi, Xiao-Bo; Liang, Jian; Xu, Mei-Feng; Wang, Zhao-Kui, E-mail: lsliao@suda.edu.cn, E-mail: zkwang@suda.edu.cn, E-mail: apcslee@cityu.edu.hk; Liao, Liang-Sheng, E-mail: lsliao@suda.edu.cn, E-mail: zkwang@suda.edu.cn, E-mail: apcslee@cityu.edu.hk [Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123 (China); Lee, Chun-Sing, E-mail: lsliao@suda.edu.cn, E-mail: zkwang@suda.edu.cn, E-mail: apcslee@cityu.edu.hk [Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR (China)

2014-06-16T23:59:59.000Z

238

Full phosphorescent white-light organic light-emitting diodes with improved color stability and efficiency by fine tuning primary emission contributions  

SciTech Connect (OSTI)

In this paper, a novel type of white-light organic light emitting diode (OLED) with high color stability was reported, in which the yellow-light emission layer of (4,4{sup ?}-N,N{sup ?}-dicarbazole)biphenyl (CBP) : tris(2-phenylquinoline-C2,N{sup ?})iridium(III) (Ir(2-phq){sub 3}) was sandwiched by double blue-light emission layers of 1,1-bis-[(di-4-tolylamino)pheny1]cyclohexane (TAPC) : bis[4,6-(di-fluorophenyl)-pyridinato-N,C2{sup ?}]picolinate (FIrpic) and tris[3-(3-pyridyl)mesityl]borane (3TPYMB):FIrpic. And, it exhibited the maximum current efficiency of 33.1 cd/A, the turn-on voltage at about 3 V and the maximum luminance in excess of 20000 cd/m{sup 2}. More important, it realized very stable white-light emission, and its CIE(x, y) coordinates only shift from (0.34, 0.37) to (0.33, 0.37) as applied voltage increased from 5 V to 12 V. It is believed that the new scheme in emission layer of white-light OLED can fine tune the contribution of primary emission with applied voltage changed, resulting in high quality white-light OLED.

Hua, Wang, E-mail: wmsu2008@sinano.ac.cn, E-mail: wanghua001@tyut.edu.cn; Du, Xiaogang [Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Ministry of Education, Taiyuan 030024 (China) [Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Ministry of Education, Taiyuan 030024 (China); Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan 030024 (China); Su, Wenming, E-mail: wmsu2008@sinano.ac.cn, E-mail: wanghua001@tyut.edu.cn; Zhang, Dongyu [Printable Electronics Research Centre, Suzhou Institute of Nano-Tech and Nano-Bionics, CAS, suzhou 215123 (China)] [Printable Electronics Research Centre, Suzhou Institute of Nano-Tech and Nano-Bionics, CAS, suzhou 215123 (China); Lin, Wenjing [Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Ministry of Education, Taiyuan 030024 (China) [Key Laboratory of Interface Science and Engineering in Advanced Materials, Taiyuan University of Technology, Ministry of Education, Taiyuan 030024 (China); Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan 030024 (China); Printable Electronics Research Centre, Suzhou Institute of Nano-Tech and Nano-Bionics, CAS, suzhou 215123 (China)

2014-02-15T23:59:59.000Z

239

All-small-molecule efficient white organic light-emitting diodes by multi-layer blade coating  

E-Print Network [OSTI]

Letter All-small-molecule efficient white organic light-emitting diodes by multi-layer blade-molecule organic light-emitting diodes are fabricated by multi-layer blade coating on hot plate at 80 °C with hot.3 lm/W). Orange emitter iridium(III)bis (4-(4-t-butylphenyl) thie- no[3,2-c]pyridinato-N,C20

Meng, Hsin-Fei

240

Radiation Dose-Volume Effects and the Penile Bulb  

SciTech Connect (OSTI)

The dose, volume, and clinical outcome data for penile bulb are reviewed for patients treated with external-beam radiotherapy. Most, but not all, studies find an association between impotence and dosimetric parameters (e.g., threshold doses) and clinical factors (e.g., age, comorbid diseases). According to the data available, it is prudent to keep the mean dose to 95% of the penile bulb volume to <50 Gy. It may also be prudent to limit the D70 and D90 to 70 Gy and 50 Gy, respectively, but coverage of the planning target volume should not be compromised. It is acknowledged that the penile bulb may not be the critical component of the erectile apparatus, but it seems to be a surrogate for yet to be determined structure(s) critical for erectile function for at least some techniques.

Roach, Mack, E-mail: mroach@radonc.ucsf.ed [Department of Radiation Oncology, University of California-San Francisco, San Francisco, CA (United States); Nam, Jiho [Department of Radiation Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC (United States); Gagliardi, Giovanna [Department of Medical Physics, Karolinska University Hospital and Karolinska Institutet, Stockholm (Sweden); El Naqa, Issam; Deasy, Joseph O. [Department of Radiation Oncology, School of Medicine, Washington University in St. Louis, St. Louis, MO (United States); Marks, Lawrence B. [Department of Radiation Oncology, University of North Carolina at Chapel Hill, Chapel Hill, NC (United States)

2010-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Recessed Lighting in the Limelight  

SciTech Connect (OSTI)

Recessed downlights are among the most popular installed lighting fixtures for new and remodeled homes. DOE estimates there are at least 350 million currently installed in US homes, and around 20 million are sold each year. A recent California study showed only 0.4 percent of recessed cans used compact fluorescent lamps. Annual reported sales of fluorescent residential recessed downlights nationwide make up no more than three percent of total residential recessed downlight sales. Standard recessed downlights waste energy by leaking conditioned air to unconditioned attic space, and using less efficient, high-heat incandescent bulbs. 33 states have adopted building codes that require recessed cans installed in the building shell to be airtight. To encourage lighting fixture manufacturers to bring to market high-efficiency air-tight recessed cans, DOE is sponsoring the recessed downlights project. PNNL solicited bids for energy efficient recessed downlights meeting the following specifications: They must use pin-based CFLs, have an airtight housing, be IC-rated, use electronic ballasts, and have a light output minimum of 900 initial lumens. PNNL did short- and long-term testing of the submitted lamps and negotiated lower prices for consumer purchase of qualifying models.

Gordon, Kelly L.; McCullough, Jeffrey J.

2003-02-01T23:59:59.000Z

242

Basic Research Needs for Solid-State Lighting. Report of the Basic Energy Sciences Workshop on Solid-State Lighting, May 22-24, 2006  

SciTech Connect (OSTI)

The workshop participants enthusiastically concluded that the time is ripe for new fundamental science to beget a revolution in lighting technology. SSL sources based on organic and inorganic materials have reached a level of efficiency where it is possible to envision their use for general illumination. The research areas articulated in this report are targeted to enable disruptive advances in SSL performance and realization of this dream. Broad penetration of SSL technology into the mass lighting market, accompanied by vast savings in energy usage, requires nothing less. These new ?good ideas? will be represented not by light bulbs, but by an entirely new lighting technology for the 21st century and a bright, energy-efficient future indeed.

Phillips, J. M.; Burrows, P. E.; Davis, R. F.; Simmons, J. A.; Malliaras, G. G.; So, F.; Misewich, J.A.; Nurmikko, A. V.; Smith, D. L.; Tsao, J. Y.; Kung, H.; Crawford, M. H.; Coltrin, M. E.; Fitzsimmons, T. J.; Kini, A.; Ashton, C.; Herndon, B.; Kitts, S.; Shapard, L.; Brittenham, P. W.; Vittitow, M. P.

2006-05-24T23:59:59.000Z

243

EK101 Engineering Light Project: Evaluate Residential Lighting  

E-Print Network [OSTI]

for residential lighting (LED, Compact Fluorescent, Incandescent). Develop a plan of experiments to be conducted, CF, and Incandescent bulbs for the past ten years. (try the wayback time machine if other sources fail). Discuss the key challenges associated with a transition from incandescent lighting

Bifano, Thomas

244

Enhanced light-conversion efficiency of titanium-dioxide dye-sensitized solar cells with the addition of  

E-Print Network [OSTI]

Enhanced light-conversion efficiency of titanium- dioxide dye-sensitized solar cells-doped tin oxide (FTO) nanoparticles and the application of such electrodes on dye-sensitized solar cell to the presence of ITO or FTO nanoparticles. Keywords: dye-sensitized solar cell, nanoparticle, electrode film

Cao, Guozhong

245

Investigating the Influence of Geometrical Traits on Light Interception Efficiency of Apple Trees: a Modelling Study with MAppleT  

E-Print Network [OSTI]

Investigating the Influence of Geometrical Traits on Light Interception Efficiency of Apple Trees-structural plant model that has been built for simulating architectural development of apple trees. It has depends on geometrical traits. The purpose of this research is to investigate the influence of apple trees

Paris-Sud XI, Université de

246

23.2 / J. X. Sun 23.2: An Efficient Stacked OLED with Double-Sided Light Emission  

E-Print Network [OSTI]

23.2 / J. X. Sun 23.2: An Efficient Stacked OLED with Double-Sided Light Emission J. X. Sun, X. L;23.2 / J. X. Sun 2. Experimental Details The SOLED were fabricated on 75nm-ITO coated glass with a sheet

247

Towards high efficiency thin-film crystalline silicon solar cells: The roles of light trapping and non-radiative recombinations  

SciTech Connect (OSTI)

Thin-film solar cells based on silicon have emerged as an alternative to standard thick wafers technology, but they are less efficient, because of incomplete absorption of sunlight, and non-radiative recombinations. In this paper, we focus on the case of crystalline silicon (c-Si) devices, and we present a full analytic electro-optical model for p-n junction solar cells with Lambertian light trapping. This model is validated against numerical solutions of the drift-diffusion equations. We use this model to investigate the interplay between light trapping, and bulk and surface recombination. Special attention is paid to surface recombination processes, which become more important in thinner devices. These effects are further amplified due to the textures required for light trapping, which lead to increased surface area. We show that c-Si solar cells with thickness of a few microns can overcome 20% efficiency and outperform bulk ones when light trapping is implemented. The optimal device thickness in presence of light trapping, bulk and surface recombination, is quantified to be in the range of 10–80??m, depending on the bulk quality. These results hold, provided the effective surface recombination is kept below a critical level of the order of 100?cm/s. We discuss the possibility of meeting this requirement, in the context of state-of-the-art techniques for light trapping and surface passivation. We show that our predictions are within the capability of present day silicon technologies.

Bozzola, A., E-mail: angelo.bozzola@unipv.it; Kowalczewski, P.; Andreani, L. C. [Physics Department, University of Pavia and CNISM, via Bassi 6, I-27100 Pavia (Italy)

2014-03-07T23:59:59.000Z

248

Energy-Efficiency Labels and Standards: A Guidebook for Appliances, Equipment, and Lighting - 2nd Edition  

E-Print Network [OSTI]

minimum efficiency standards, initiated in 1989, was strengthened by the Energy Conservation Law in 1997, which put end- use energy efficiency and standards

Wiel, Stephen; McMahon, James E.

2005-01-01T23:59:59.000Z

249

Efficiency loss mechanisms in colloidal quantum-dot light-emitting diodes  

E-Print Network [OSTI]

Saturated and tunable emission colors make colloidal quantum-dot light-emitting diodes (QD-LEDs) interesting for the next generation of display and lighting technologies. However, there still remain various hurdles to the ...

Shirasaki, Yasuhiro

2013-01-01T23:59:59.000Z

250

High-Efficiency White Organic Light-Emitting Devices Based on a Highly Amorphous Iridium(III) Orange Phosphor  

E-Print Network [OSTI]

- didates as future illumination sources over the conventional incandescent bulbs and fluorescent lamps of the electroluminescence spectrum is observed, with the blue color intensity increasing relative to the orange component been prepared using this stacked concept with both fluorescent12,13 and phosphorescent emitters.14

251

Highly efficient inverted top emitting organic light emitting diodes using a transparent top electrode with color stability on viewing angle  

SciTech Connect (OSTI)

We report a highly efficient phosphorescent green inverted top emitting organic light emitting diode with excellent color stability by using the 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile/indium zinc oxide top electrode and bis(2-phenylpyridine)iridium(III) acetylacetonate as the emitter in an exciplex forming co-host system. The device shows a high external quantum efficiency of 23.4% at 1000?cd/m{sup 2} corresponding to a current efficiency of 110?cd/A, low efficiency roll-off with 21% at 10?000?cd/m{sup 2} and low turn on voltage of 2.4?V. Especially, the device showed very small color change with the variation of ?x?=?0.02, ?y?=?0.02 in the CIE 1931 coordinates as the viewing angle changes from 0° to 60°. The performance of the device is superior to that of the metal/metal cavity structured device.

Kim, Jung-Bum; Lee, Jeong-Hwan; Moon, Chang-Ki; Kim, Jang-Joo, E-mail: jjkim@snu.ac.kr [Department of Materials Science and Engineering, Seoul National University, Seoul 151-742 (Korea, Republic of)

2014-02-17T23:59:59.000Z

252

A Bit About Bulbs Night temperatures are cool, the air is almost crisp. The vegetable harvest is tapering  

E-Print Network [OSTI]

work their way down and stems go up where they belong. Purchase from reliable dealers to assure quality is the general rule to follow. If you are dealing with a strangely shaped bulb species that doesn't seem to have of moisture. A quality bulb is a large bulb; it will produce larger flowers and more of them. The bulb should

New Hampshire, University of

253

Efficient light emitting devices utilizing CdSe(ZnS) quantum dots in organic host matrices  

E-Print Network [OSTI]

We demonstrate efficient electroluminescence from thin film structures containing core-shell CdSe(ZnS) quantum dots dispersed in molecular organic host materials. In the most efficient devices, excitons are created on the ...

Coe-Sullivan, Seth (Seth Alexander)

2002-01-01T23:59:59.000Z

254

Cape Light Compact- Commercial, Industrial and Municipal Buildings Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Through a multi-member partnership, Cape Light Compact (CLC) and Masssave offer a variety of financial incentives for commercial, industrial, and municipal facilities. Custom rebate options are...

255

Estes Park Light and Power Department- Commercial and Industrial Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Estes Park Power and Light, in conjunction with the Platte River Power Authority provides businesses incentives for new construction projects and existing building retrofits. The Electric...

256

Modeling of temperature and excitation dependences of efficiency in an InGaN light-emitting diode  

E-Print Network [OSTI]

The changes in excitation dependence of efficiency with temperature is modeled for a wurtzite InGaN light-emitting diode. The model incorporates bandstructure changes with carrier density arising from screening of quantum-confined Stark effect. Bandstructure is computed by solving Poisson and k.p equations in the envelop approximation. The information is used in a dynamical model for populations in momentum-resolved electron and hole states. Application of the approach shows the interplay of quantum-well and barrier emissions giving rise to shape changes in efficiency versus current density with changing temperature, as observed in some experiments.

Chow, Weng W

2013-01-01T23:59:59.000Z

257

Electrical and Optical Enhancement in Internally Nanopatterned Organic Light-Emitting Diodes  

E-Print Network [OSTI]

incandescent bulbs and fluorescent bulbs). Solid-stateindex (CRI) than fluorescent bulbs. Common examples where

Fina, Michael Dane

2012-01-01T23:59:59.000Z

258

Fluorescence Efficiency and Stability of Radio-Pure Tetraphenyl-butadiene Based Coatings for VUV Light Detection in Cryogenic Environments  

E-Print Network [OSTI]

The detection of VUV scintillation light, e.g. in (liquid) argon detectors, commonly includes a reflector with a fluorescent coating, converting UV photons to visible light. The light yield of these detectors depends directly on the conversion efficiency. Several coating/reflector combinations were produced using VM2000, a specular reflecting multi layer polymer, and Tetratex, a diffuse reflecting PTFE fabric, as reflector foils. The efficiency of these coatings was optimised and has been measured in a dedicated liquid argon setup built at the University of Zurich. It employs a small, 1.3 kg LAr cell viewed by a 3-inch, low radioactivity PMT of type R11065-10 from Hamamatsu. The cryogenic stability of these coatings was additionally studied. The optimum reflector/coating combination was found to be Tetratex dip coated with Tetraphenyl-butadiene with a thickness of 0.9 mg/cm$^2$ resulting in a 3.6 times higher light yield compared to uncoated VM2000. Its performance was stable in long term measurements, ran up...

Baudis, Laura; Dressler, Rugard; Piastra, Francesco; Usoltsev, Ilya; Walter, Manuel

2015-01-01T23:59:59.000Z

259

Investigating potential light-duty efficiency improvements through simulation of turbo-compounding and waste-heat recovery systems  

SciTech Connect (OSTI)

Modern diesel engines used in light-duty transportation applications have peak brake thermal efficiencies in the range of 40-42% for high-load operation with substantially lower efficiencies at realistic road-load conditions. Thermodynamic energy and exergy analysis reveals that the largest losses from these engines are due to combustion irreversibility and heat loss to the coolant, through the exhaust, and by direct convection and radiation to the environment. Substantial improvement in overall engine efficiency requires reducing or recovering these losses. Unfortunately, much of the heat transfer either occurs at relatively low temperatures resulting in large entropy generation (such as in the air-charge cooler), is transferred to low-exergy flow streams (such as the oil and engine coolant), or is radiated or convected directly to the environment. While there are significant opportunities for recovery from the exhaust and EGR cooler for heavy-duty applications, achieving similar benefits for light-duty applications is complicated by transient, low-load operation at typical driving conditions and competition with the turbocharger and aftertreatment system for the limited thermal resources. We have developed an organic Rankine cycle model using GT-Suite to investigate the potential for efficiency improvement through waste-heat recovery from the exhaust and EGR cooler of a light-duty diesel engine. The model is used to examine the effects of efficiency-improvement strategies such as cylinder deactivation, use of advanced materials and improved insulation to limit ambient heat loss, and turbo-compounding on the steady-state performance of the ORC system and the availability of thermal energy for downstream aftertreatment systems. Results from transient drive-cycle simulations are also presented, and we discuss strategies to address operational difficulties associated with transient drive cycles and balancing the thermal requirements of waste-heat recovery, turbocharging or turbo-compounding, and exhaust aftertreatment.

Edwards, Kevin Dean [ORNL; Wagner, Robert M [ORNL; Briggs, Thomas E [ORNL

2010-01-01T23:59:59.000Z

260

Energy Efficiency ISSN 1570-646X  

E-Print Network [OSTI]

ConEd Consolidated Edison CRT Cathode ray tube LCD Liquid crystal display LED Light emitting diode included combustion, incandescent and compact fluorescent (CFL) bulbs, and now light emitting diode (LED emitting diodes (LED), has been sug- gested as a way of reducing energy used for lighting. Such predictions

Illinois at Chicago, University of

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

An optimal light-extracting overlayer, inspired by the lantern of a Photuris firefly, to improve the external efficiency of existing light-emitting diodes  

E-Print Network [OSTI]

Actual light emission diodes (LED) have most often good internal efficiencies but poor external efficiencies due to total internal reflection at the air interface. In this paper the design, fabrication and characterization of a bioinspired overlayer deposited on a GaN LED is investigated. The purpose of this overlayer is to improve light extraction into air, after the photons have been generated in the diode's high refractive-index active material. The layer design is inspired by the microstructure found in the firefly Photuris sp., described by Bay et al. : a surface with an asymmetrical triangular profile (a "factory-roof" shape), developed on the scale of a few micrometers, thus somewhat larger than usually suggested in the related literature. The profile of the overlayer corrugated surface of the coating film was copied from the natural model. Yet, the actual dimensions and material composition have been optimized to take into account the high refractive index of the GaN diode stack. The optimization proc...

Bay, Annick; Sarrazin, Michael; Belarouci, Ali; Aimez, Vincent; Francis, Laurent A; Vigneron, Jean Pol

2012-01-01T23:59:59.000Z

262

Interstate Power and Light (Alliant Energy)- Farm Equipment Energy Efficiency Incentives  

Broader source: Energy.gov [DOE]

Alliant Energy offers prescriptive rebates for a variety of energy efficient products for agricultural customers. These include irrigation equipment, dairy equipment, ventilation systems,...

263

High Efficiency Clean Combustion in Multi-Cylinder Light-Duty...  

Broader source: Energy.gov (indexed) [DOE]

challenges and is currently focused on milestones associated with Vehicle Technologies efficiency and emissions objectives. Overview 11 *http:www1.eere.energy.gov...

264

Enhancing the quantum efficiency of InGaN yellow-green light-emitting diodes by growth interruption  

SciTech Connect (OSTI)

We studied the effect of multiple interruptions during the quantum well growth on emission-efficiency enhancement of InGaN-based yellow-green light emitting diodes on c-plane sapphire substrate. The output power and dominant wavelength at 20?mA are 0.24 mW and 556.3?nm. High resolution x-ray diffraction, photoluminescence, and electroluminescence measurements demonstrate that efficiency enhancement could be partially attributed to crystal quality improvement of the active region resulted from reduced In clusters and relevant defects on the surface of InGaN layer by introducing interruptions. The less tilted energy band in the quantum well is also caused by the decrease of In-content gradient along c-axis resulted from In segregation during the interruptions, which increases spatial overlap of electron-hole wavefunction and thus the internal quantum efficiency. The latter also leads to smaller blueshift of dominant wavelength with current increasing.

Du, Chunhua; Ma, Ziguang; Zhou, Junming; Lu, Taiping; Jiang, Yang; Zuo, Peng; Jia, Haiqiang; Chen, Hong, E-mail: hchen@iphy.ac.cn [Key Laboratory for Renewable Energy, Chinese Academy of Sciences, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condense Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)

2014-08-18T23:59:59.000Z

265

Alliant Energy Interstate Power and Light (Gas)- Business Energy Efficiency Rebate Program (Iowa)  

Broader source: Energy.gov [DOE]

Interstate Power and Light (IPL) offers a wide variety of incentives for commercial customers to save energy in eligible facilities, whether they are upgrading existing facilities or building new...

266

Comparing directed efficiency of III-nitride nanowire light-emitting diodes  

E-Print Network [OSTI]

III-nitride-based nanowires are a promising platform for solid-state lighting. III-nitride nanowires that act as natural waveguides to enhance directed extraction have previously been shown to be free of extended defects ...

Gradecak, Silvija

267

Colloidal Quantum Dot Light-Emitting Diodes Employing Phosphorescent Small Organic Molecules as Efficient Exciton  

E-Print Network [OSTI]

engineer, the potential energy transfer pumping scheme. Only Zhang et al. reported an enhancement enhancement factor in the external quantum efficiency over the conventional QLED structure, in which energy as Efficient Exciton Harvesters Evren Mutlugun,,,§, Burak Guzelturk,,§, Agus Putu Abiyasa,§, Yuan Gao,§ Xiao

Demir, Hilmi Volkan

268

Pousset, Obein, Razet, LED lighting quality with CQS samples CIE 2010 : Lighting Quality and Energy Efficiency, 14-17 March 2010, Vienna, Austria 1  

E-Print Network [OSTI]

A psychophysical experiment developed to evaluate light quality of Light Emitting Diodes (LEDs) is described. Keywords: Light Emitting Diode, quality of light, Color Rendering Index, Color Quality Scale, visual

Paris-Sud XI, Université de

269

High efficiency thin film silicon solar cells with novel light trapping : principle, design and processing  

E-Print Network [OSTI]

One major efficiency limiting factor in thin film solar cells is weak absorption of long wavelength photons due to the limited optical path length imposed by the thin film thickness. This is especially severe in Si because ...

Zeng, Lirong, Ph. D. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

270

Harnessing waste heat and reducing wasted lighting : three mechanical structures for efficient energy systems  

E-Print Network [OSTI]

This thesis presents three mechanical structures designed for efficient energy systems. In [3], Cooley presents a modification of a fluorescent lamp which allows it to detect nearby occupants and dim itself automatically. ...

Stronger, Brad A

2008-01-01T23:59:59.000Z

271

Understanding the role of ultra-thin polymeric interlayers in improving efficiency of polymer light emitting diodes  

SciTech Connect (OSTI)

Insertion of ultra-thin polymeric interlayers (ILs) between the poly(3,4-ethylenedioxythiophene):polystyrene sulphonate hole injection and poly(9,9-dioctylfluorene-alt-benzothiadiazole) (F8BT) light emission layers of polymer light emitting diodes (PLEDs) can significantly increase their efficiency. In this paper, we investigate experimentally a broad range of probable causes of this enhancement with an eye to determining which IL parameters have the most significant effects. The importance of hole injection and electron blocking was studied through varying the IL material (and consequently its electronic energy levels) for both PLED and hole-only diode structures. The role of IL conductivity was examined by introducing a varying level of charge-transfer doping through blending the IL materials with a strong electron-accepting small molecule in concentrations from 1% to 7% by weight. Depositing ILs with thicknesses below the exciton diffusion length of ?15?nm allowed the role of the IL as a physical barrier to exciton quenching to be probed. IL containing PLEDs was also fabricated with Lumation Green Series 1300 (LG 1300) light emission layers. On the other hand, the PLEDs were modeled using a 3D multi-particle Kinetic Monte Carlo simulation coupled with an optical model describing how light is extracted from the PLED. The model describes charge carrier transport and interactions between electrons, holes, singlets, and triplets, with the current density, luminance, and recombination zone (RZ) locations calculated for each PLED. The model shows F8BT PLEDs have a narrow charge RZ adjacent to the anode, while LG 1300 PLEDs have a wide charge RZ that is evenly distributed across the light emitting layer. Varying the light emitting layer from F8BT to Lumation Green Series 1300, we therefore experimentally examine the dependence of the IL function, specifically in regard to anode-side exciton quenching, on the location of the RZ. We found an exponential dependence of F8BT PLED luminance on the difference, ?, in the highest occupied to lowest unoccupied molecular orbital energy gap between the light emitting polymer and a semiconducting polymeric IL, with ? consequently the most important parameter determining efficiency. Understanding the exponential effect that wider energy gap IL materials have on exciton quenching may allow ? to be used to better guide PLED structure design.

Bailey, Jim; Wang, Xuhua; Bradley, Donal D. C.; Kim, Ji-Seon, E-mail: ji-seon.kim@imperial.ac.uk [Department of Physics and Centre for Plastic Electronics, South Kensington Campus, Imperial College London, London SW7 2AZ (United Kingdom); Wright, Edward N.; Walker, Alison B. [Department of Physics, University of Bath, Bath BA2 7AY (United Kingdom)

2014-05-28T23:59:59.000Z

272

Bright prospects for lighting retrofits  

SciTech Connect (OSTI)

Great potential for energy savings can be found in the alleys, hallways and stairwells of multifamily buildings, but this potential is not always easy to realize. This article discusses the solution to common problems, retrofitting mistakes, retrofitting for savings, replacements for incandescent bulbs, better exit lights. 1 fig., 1 tab.

Hasterok, L. [Wisconsin Energy Conservation Corp., Madison, WI (United States)

1995-09-01T23:59:59.000Z

273

DOE Investment Yields R&D 100 Award Winner in Energy-Efficient Lighting  

Broader source: Energy.gov [DOE]

RTI International's nanofiber lighting improvement technology (NLITe™) has been honored with a 2011 R&D 100 Award. Established in 1963 by the editors of R&D Magazine, the annual R&D 100 Awards identify the 100 most significant, newly introduced research and development advances of the past year in multiple disciplines.

274

A Dual-Supply Buck Converter with Improved Light-Load Efficiency  

E-Print Network [OSTI]

to the switching losses that do not scale with load current. In this research, a novel technique for buck converter is proposed to reduce the switching loss by reducing the effective voltage supply at light load. This buck converter, implemented in TSMC 0...

Zhang, Chao

2012-07-16T23:59:59.000Z

275

Tunable Localized Surface Plasmon-Enabled Broadband Light-Harvesting Enhancement for High-Efficiency Panchromatic Dye-Sensitized Solar Cells  

E-Print Network [OSTI]

In photovoltaic devices, light harvesting (LH) and carrier collection have opposite relations with the thickness of the photoactive layer, which imposes a fundamental compromise for the power conversion efficiency (PCE). ...

Dang, Xiangnan

276

Influences of excitation-dependent bandstructure changes on InGaN light-emitting diode efficiency  

E-Print Network [OSTI]

Bandstructure properties in wurtzite quantum wells can change appreciably with changing carrier density because of screening of quantum-confined Stark effect. An approach for incorporating these changes in an InGaN light-emitting-diode model is described. Bandstructure is computed for different carrier densities by solving Poisson and k\\cdotp equations in the envelop approximation. The information is used as input in a dynamical model for populations in momentum-resolved electron and hole states. Application of the approach is illustrated by modeling device internal quantum efficiency as a function of excitation.

Chow, Weng W

2011-01-01T23:59:59.000Z

277

Extremely Efficient Indium-Tin-Oxide-Free Green Phosphorescent Organic Light-Emitting Diodes  

SciTech Connect (OSTI)

This paper demonstrates extremely efficient (?P,max = 118 lm W?1) ITO-free green phosphorescent OLEDs (PHOLEDs) with multilayered, highly conductive poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) films as the anode. The efficiency is obtained without any outcoupling-enhancing structures and is 44% higher than the 82 lm W?1 of similar optimized ITO-anode PHOLEDs. Detailed simulations show that this improvement is due largely to the intrinsically enhanced outcoupling that results from a weak microcavity effect.

Cai, Min; Ye, Zhuo; Xiao, Teng; Liu, Rui; Chen, Ying; Mayer, Robert W.; Biswas, Rana; Ho, Kai-Ming; Shinar, Ruth; Shinar, Joseph

2012-07-12T23:59:59.000Z

278

Alternative p-doped hole transport material for low operating voltage and high efficiency organic light-emitting diodes  

SciTech Connect (OSTI)

We investigate the properties of N,N?-[(Diphenyl-N,N?-bis)9,9,-dimethyl-fluoren-2-yl]-benzidine (BF-DPB) as hole transport material (HTL) in organic light-emitting diodes (OLEDs) and compare BF-DPB to the commonly used HTLs N,N,N?,N?-tetrakis(4-methoxyphenyl)-benzidine (MeO-TPD), 2,2?,7,7?-tetrakis(N,N?-di-p-methylphenylamino)-9,9?-spirobifluorene (Spiro-TTB), and N,N?-di(naphtalene-1-yl)-N,N?-diphenylbenzidine (NPB). The influence of 2,2?-(perfluoronaphthalene-2,6-diylidene)dimalononitrile (F6-TCNNQ p-dopant) concentration in BF-DPB on the operation voltage and efficiency of red and green phosphorescent OLEDs is studied; best results are achieved at 4?wt. % doping. Without any light extraction structure, BF-DPB based red (green) OLEDs achieve a luminous efficacy of 35?.1?lm/W (74?.0?lm/W) at 1000?cd/m{sup 2} and reach a very high brightness of 10?000 cd/m{sup 2} at a very low voltage of 3.2 V (3.1 V). We attribute this exceptionally low driving voltage to the high ionization potential of BF-DPB which enables more efficient hole injection from BF-DPB to the adjacent electron blocking layer. The high efficiency and low driving voltage lead to a significantly lower luminous efficacy roll-off compared to the other compounds and render BF-DPB an excellent HTL material for highly efficient OLEDs.

Murawski, Caroline, E-mail: caroline.murawski@iapp.de; Fuchs, Cornelius; Hofmann, Simone; Leo, Karl [Institut für Angewandte Photophysik, Technische Universität Dresden, George-Bähr-Str. 1, 01062 Dresden (Germany); Gather, Malte C. [Institut für Angewandte Photophysik, Technische Universität Dresden, George-Bähr-Str. 1, 01062 Dresden (Germany); SUPA, School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, KY16 9SS Scotland (United Kingdom)

2014-09-15T23:59:59.000Z

279

Efficiency Improvement Opportunities for Light-Duty Natural-Gas-Fueled Vehicles  

SciTech Connect (OSTI)

The purpose of this report is to evaluate and make recommendations concerning technologies that promise to improve the efilciency of compressed natural gas (CNG) light-duty vehicles. Technical targets for CNG automotive technology given in the March 1998 OffIce of Advanced Automotive Technologies research and development plan were used as guidance for this effort. The technical target that necessitates this current study is to validate technologies that enable CNG light vehicles to have at least 10% greater - fuel economy (on a miles per gallon equivalent basis) than equivalent gasoline vehicles by 2006. Other tar- gets important to natural gas (NG) automotive technology and this study are to: (1) increase CNG vehicle range to 380 miles, (2) reduce the incremental vehicle cost (CNG vs gasoline) to $1500, and (3) meet the California ultra low-emission vehicle (ULEV) and Federal Tier 2 emission standards expected to be in effect in 2004.

Staunton, R.H.; Thomas, J.F.

1998-12-01T23:59:59.000Z

280

Solvothermal synthesis of designed nonstoichiometric strontium titanate for efficient visible-light photocatalysis  

SciTech Connect (OSTI)

SrTiO{sub 3} powders with various Sr/Ti atomic ratios were synthesized by microwave-assisted solvothermal reactions of SrCl{sub 2} and Ti(OC{sub 3}H{sub 7}){sub 4} in KOH aqueous solutions. The nanoparticles of perovskite type SrTiO{sub 3} structure with the particle size of 30-40 nm were synthesized. The photocatalytic activity was determined by deNO{sub x} ability using light emitting diode lamps of various wavelengths such as 627 nm (red), 530 nm (green), 445 nm (blue), and 390 nm (UV). The photocatalytic activity significantly changed depending on the Sr/Ti atomic ratio, i.e., the strontium rich sample (Sr/Ti atomic ratio>1) showed excellent visible light responsive photocatalytic activity for the oxidative destruction of NO.

Sulaeman, Uyi; Yin, Shu; Sato, Tsugio [Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577 (Japan)

2010-09-06T23:59:59.000Z

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Efficient light harvesting in multiple-device stacked structure for polymer solar cells  

E-Print Network [OSTI]

high efficiency in these polymer PV devices, it is important that the solar radiation is absorbed is solution processed, spincoating multiple layers in tandem can result in significant damage to the bottom on the optical and electrical properties is utilized in our multiple- device stacked structure. The most

282

Enhancement of Radiative Efficiency with Staggered InGaN Quantum Well Light Emitting Diodes  

SciTech Connect (OSTI)

The technology on the large overlap InGaN QWs developed in this program is currently implemented in commercial technology in enhancing the internal quantum efficiency in major LED industry in US and Asia. The scientific finding from this work supported by the DOE enabled the implementation of this step-like staggered quantum well in the commercial LEDs.

Tansu, Nelson; Dierolf, Volkmar; Huang, Gensheng; Penn, Samson; Zhao, Hongping; Liu, Guangyu; Li, Xiaohang; Poplawsky, Jonathan

2011-07-14T23:59:59.000Z

283

Temperature-dependent efficiency droop of blue InGaN micro-light emitting diodes  

SciTech Connect (OSTI)

Temperature-dependent trends in radiative and Auger recombination coefficients have been determined at different injection carrier concentrations using InGaN micro-light emitting diodes 40 ?m in diameter. The differential lifetime was obtained first from the measured modulation bandwidth and was then employed to calculate the carrier concentration in the quantum well active region. When the temperature increases, the carrier concentration increases, but both the radiative and Auger recombination coefficients decrease. In addition, the temperature dependence of radiative and Auger recombination coefficients is weaker at a higher injection carrier concentration, which is strongly related to phase space filling.

Tian, Pengfei; McKendry, Jonathan J. D.; Herrnsdorf, Johannes; Ferreira, Ricardo; Watson, Ian M.; Gu, Erdan, E-mail: erdan.gu@strath.ac.uk; Dawson, Martin D. [Institute of Photonics, University of Strathclyde, 106 Rottenrow, Glasgow G4 0NW (United Kingdom); Watson, Scott; Kelly, Anthony E. [School of Engineering, University of Glasgow, James Watt South Building, Glasgow G12 8LT (United Kingdom)

2014-10-27T23:59:59.000Z

284

South Carolina Community Lights Up the Season with Energy-Efficient Holiday  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of Inspector GeneralDepartment of Energyof the Americas |DOEEnergy32.1 (October 2011) 1Lights | Department

285

Glass-Encapsulated Light Harvesters: More Efficient Dye-Sensitized Solar Cells by Deposition of Self-Aligned, Conformal, and Self-  

E-Print Network [OSTI]

Glass-Encapsulated Light Harvesters: More Efficient Dye-Sensitized Solar Cells by Deposition Supporting Information ABSTRACT: A major loss mechanism in dye-sensitized solar cells (DSCs) is recombination% increase in relative efficiency versus control uncoated cells. Dye-sensitized solar cells (DSCs) have great

286

Buildings Energy Data Book: 7.6 Efficiency Standards for Lighting  

Buildings Energy Data Book [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data CenterEnergyAuthorization for(EV) Road UserNatural1 Efficiency Standards

287

Buildings Energy Data Book: 7.7 Efficiency Standards for Lighting  

Buildings Energy Data Book [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data CenterEnergyAuthorization for(EV) Road UserNatural1 Efficiency

288

University of Winnipeg Department of Theatre and Film Safe Handling of Lighting Instruments Updated: 09/2010  

E-Print Network [OSTI]

. - Depending on the facility you are working in wattages may vary. Replace bulbs only of the same type the pipe and lower or hand it down to a spotter. CHANGING LAMPS: - The light must be physically unplugged to change a bulb you must wait a minimum of 5 minutes after the lamp has been on and you must use gloves

Martin, Jeff

289

Efficient energy transfer in light-harvesting systems, I: optimal temperature, reorganization energy, and spatial-temporal correlations  

E-Print Network [OSTI]

Understanding the mechanisms of efficient and robust energy transfer in light-harvesting systems provides new insights for the optimal design of artificial systems. In this paper, we use the Fenna-Matthews-Olson (FMO) protein complex and phycocyanin 645 (PC 645) to explore the general dependence on physical parameters that help maximize the efficiency and maintain its stability. With the Haken-Strobl model, the maximal energy transfer efficiency (ETE) is achieved under an intermediate optimal value of dephasing rate. To avoid the infinite temperature assumption in the Haken-Strobl model and the failure of the Redfield equation in predicting the Forster rate behavior, we use the generalized Bloch-Redfield (GBR) equation approach to correctly describe dissipative exciton dynamics and find that maximal ETE can be achieved under various physical conditions, including temperature, reorganization energy, and spatial-temporal correlations in noise. We also identify regimes of reorganization energy where the ETE changes monotonically with temperature or spatial correlation and therefore cannot be optimized with respect to these two variables.

Jianlan Wu; Fan Liu; Young Shen; Jianshu Cao; Robert J. Silbey

2010-09-16T23:59:59.000Z

290

Buildings Energy Data Book: 7.6 Efficiency Standards for Lighting  

Buildings Energy Data Book [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data CenterEnergyAuthorization for(EV) Road UserNatural1 Efficiency Standards2

291

Buildings Energy Data Book: 7.6 Efficiency Standards for Lighting  

Buildings Energy Data Book [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data CenterEnergyAuthorization for(EV) Road UserNatural1 Efficiency Standards23

292

Buildings Energy Data Book: 7.6 Efficiency Standards for Lighting  

Buildings Energy Data Book [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data CenterEnergyAuthorization for(EV) Road UserNatural1 Efficiency Standards234

293

Demand for Environmentally-Friendly Durables  

E-Print Network [OSTI]

fluorescent energy efficient light bulbs (CFLs), quality includes features like the color of the light (CFLs use a different spectrum),

Martin, Leslie Aimee

2012-01-01T23:59:59.000Z

294

User-guided White Balance for Mixed Lighting Conditions Ivaylo Boyadzhiev  

E-Print Network [OSTI]

(daylight + neon un- der the cabinets + low-energy bulbs on ceiling) ex- hibits unsightly color casts a solution to the ill-posed mixed light white balance problem, based on user guidance. Users scribble

Bala, Kavita

295

Energy-Efficiency Labels and Standards: A Guidebook forAppliances, Equipment, and Lighting - 2nd Edition  

SciTech Connect (OSTI)

Energy-performance improvements in consumer products are an essential element in any government's portfolio of energy-efficiency and climate change mitigation programs. Governments need to develop balanced programs, both voluntary and regulatory, that remove cost-ineffective, energy-wasting products from the marketplace and stimulate the development of cost-effective, energy-efficient technology. Energy-efficiency labels and standards for appliances, equipment, and lighting products deserve to be among the first policy tools considered by a country's energy policy makers. The U.S. Agency for International Development (USAID) and several other organizations identified on the cover of this guidebook recognize the need to support policy makers in their efforts to implement energy-efficiency standards and labeling programs and have developed this guidebook, together with the Collaborative Labeling and Appliance Standards Program (CLASP), as a primary reference. This second edition of the guidebook was prepared over the course of the past year, four years after the preparation of the first edition, with a significant contribution from the authors and reviewers mentioned previously. Their diligent participation helps maintain this book as the international guidance tool it has become. The lead authors would like to thank the members of the Communications Office of the Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory for their support in the development, production, and distribution of the guidebook. This guidebook is designed as a manual for government officials and others around the world responsible for developing, implementing, enforcing, monitoring, and maintaining labeling and standards setting programs. It discusses the pros and cons of adopting energy-efficiency labels and standards and describes the data, facilities, and institutional and human resources needed for these programs. It provides guidance on the design, development, implementation, maintenance, and evaluation of the programs and on the design of the labels and standards themselves. In addition, it directs the reader to references and other resources likely to be useful in conducting the activities described and includes a chapter on energy policies and programs that complement appliance efficiency labels and standards. This guidebook attempts to reflect the essential framework of labeling and standards programs. It is the intent of the authors and sponsor to distribute copies of this book worldwide, at no charge, for the general public benefit. The guidebook is also available on the web at www.clasponline.org and may be downloaded to be used intact or piecemeal for whatever beneficial purposes readers may conceive.

Wiel, Stephen; McMahon, James E.

2005-04-28T23:59:59.000Z

296

Low-cost electrochemical treatment of indium tin oxide anodes for high-efficiency organic light-emitting diodes  

SciTech Connect (OSTI)

We demonstrate a simple low-cost approach as an alternative to conventional O{sub 2} plasma treatment to modify the surface of indium tin oxide (ITO) anodes for use in organic light-emitting diodes. ITO is functionalized with F{sup ?} ions by electrochemical treatment in dilute hydrofluoric acid. An electrode with a work function of 5.2?eV is achieved following fluorination. Using this electrode, a maximum external quantum efficiency of 26.0% (91?cd/A, 102?lm/W) is obtained, which is 12% higher than that of a device using the O{sub 2} plasma-treated ITO. Fluorination also increases the transparency in the near-infrared region.

Hui Cheng, Chuan, E-mail: chengchuanhui@dlut.edu.cn; Shan Liang, Ze; Gang Wang, Li; Dong Gao, Guo; Zhou, Ting; Ming Bian, Ji; Min Luo, Ying [School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China); Tong Du, Guo, E-mail: dugt@dlut.edu.cn [School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China); State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012 (China)

2014-01-27T23:59:59.000Z

297

Final report on grand challenge LDRD project : a revolution in lighting : building the science and technology base for ultra-efficient solid-state lighting.  

SciTech Connect (OSTI)

This SAND report is the final report on Sandia's Grand Challenge LDRD Project 27328, 'A Revolution in Lighting -- Building the Science and Technology Base for Ultra-Efficient Solid-state Lighting.' This project, which for brevity we refer to as the SSL GCLDRD, is considered one of Sandia's most successful GCLDRDs. As a result, this report reviews not only technical highlights, but also the genesis of the idea for Solid-state Lighting (SSL), the initiation of the SSL GCLDRD, and the goals, scope, success metrics, and evolution of the SSL GCLDRD over the course of its life. One way in which the SSL GCLDRD was different from other GCLDRDs was that it coincided with a larger effort by the SSL community - primarily industrial companies investing in SSL, but also universities, trade organizations, and other Department of Energy (DOE) national laboratories - to support a national initiative in SSL R&D. Sandia was a major player in publicizing the tremendous energy savings potential of SSL, and in helping to develop, unify and support community consensus for such an initiative. Hence, our activities in this area, discussed in Chapter 6, were substantial: white papers; SSL technology workshops and roadmaps; support for the Optoelectronics Industry Development Association (OIDA), DOE and Senator Bingaman's office; extensive public relations and media activities; and a worldwide SSL community website. Many science and technology advances and breakthroughs were also enabled under this GCLDRD, resulting in: 55 publications; 124 presentations; 10 book chapters and reports; 5 U.S. patent applications including 1 already issued; and 14 patent disclosures not yet applied for. Twenty-six invited talks were given, at prestigious venues such as the American Physical Society Meeting, the Materials Research Society Meeting, the AVS International Symposium, and the Electrochemical Society Meeting. This report contains a summary of these science and technology advances and breakthroughs, with Chapters 1-5 devoted to the five technical task areas: 1 Fundamental Materials Physics; 2 111-Nitride Growth Chemistry and Substrate Physics; 3 111-Nitride MOCVD Reactor Design and In-Situ Monitoring; 4 Advanced Light-Emitting Devices; and 5 Phosphors and Encapsulants. Chapter 7 (Appendix A) contains a listing of publications, presentations, and patents. Finally, the SSL GCLDRD resulted in numerous actual and pending follow-on programs for Sandia, including multiple grants from DOE and the Defense Advanced Research Projects Agency (DARPA), and Cooperative Research and Development Agreements (CRADAs) with SSL companies. Many of these follow-on programs arose out of contacts developed through our External Advisory Committee (EAC). In h s and other ways, the EAC played a very important role. Chapter 8 (Appendix B) contains the full (unedited) text of the EAC reviews that were held periodically during the course of the project.

Copeland, Robert Guild; Mitchell, Christine Charlotte; Follstaedt, David Martin; Lee, Stephen Roger; Shul, Randy John; Fischer, Arthur Joseph; Chow, Weng Wah Dr.; Myers, Samuel Maxwell, Jr.; Thoma, Steven George; Gee, James Martin; Coltrin, Michael Elliott; Burdick, Brent A.; Salamone, Angelo, L., Jr.; Hadley, G. Ronald; Elliott, Russell D.; Campbell, Jonathan M.; Abrams, Billie Lynn; Wendt, Joel Robert; Pawlowski, Roger Patrick; Simpson, Regina Lynn; Kurtz, Steven Ross; Cole, Phillip James; Fullmer, Kristine Wanta; Seager, Carleton Hoover; Bogart, Katherine Huderle Andersen; Biefeld, Robert Malcolm; Kerley, Thomas M.; Norman, Adam K.; Tallant, David Robert; Woessner, Stephen Matthew; Figiel, Jeffrey James; Moffat, Harry K.; Provencio, Paula Polyak; Emerson, John Allen; Kaplar, Robert James; Wilcoxon, Jess Patrick; Waldrip, Karen Elizabeth; Rohwer, Lauren Elizabeth Shea; Cross, Karen Charlene; Wright, Alan Francis; Gonzales, Rene Marie; Salinger, Andrew Gerhard; Crawford, Mary Hagerott; Garcia, Marie L.; Allen, Mark S.; Southwell, Edwin T. (Perspectives, Sedona, AZ); Bauer, Tom M.; Monson, Mary Ann; Tsao, Jeffrey Yeenien; Creighton, James Randall; Allerman, Andrew Alan; Simmons, Jerry A.; Boyack, Kevin W.; Jones, Eric Daniel; Moran, Michael P.; Pinzon, Marcia J. (Perspectives, Sedona, AZ); Pinson, Ariane O. (Perspectives, Sedona, AZ); Miksovic, Ann E. (Perspectives, Sedona, AZ); Wang, George T.; Ashby, Carol Iris Hill; Missert, Nancy A.; Koleske, Daniel David; Rahal, Nabeel M.

2004-06-01T23:59:59.000Z

298

Rapid Microwave Preparation of Highly Efficient Ce[superscript 3+]-Substituted Garnet Phosphors for Solid State White Lighting  

SciTech Connect (OSTI)

Ce{sup 3+}-substituted aluminum garnet compounds of yttrium (Y{sub 3}Al{sub 5}O{sub 12}) and lutetium (Lu{sub 3}Al{sub 5}O{sub 12}) - both important compounds in the generation of (In,Ga)N-based solid state white lighting - have been prepared using a simple microwave heating technique involving the use of a microwave susceptor to provide the initial heat source. Carbon used as the susceptor additionally creates a reducing atmosphere around the sample that helps stabilize the desired luminescent compound. High quality, phase-pure materials are prepared within a fraction of the time and using a fraction of the energy required in a conventional ceramic preparation; the microwave technique allows for a reduction of about 95% in preparation time, making it possible to obtain phase pure, Ce{sup 3+}-substituted garnet compounds in under 20 min of reaction time. It is estimated that the overall reduction in energy compared with ceramic routes as practiced in the lab is close to 99%. Conventionally prepared material is compared with material prepared using microwave heating in terms of structure, morphology, and optical properties, including quantum yield and thermal quenching of luminescence. Finally, the microwave-prepared compounds have been incorporated into light-emitting diode 'caps' to test their performance characteristics in a real device, in terms of their photon efficiency and color coordinates.

Birkel, Alexander; Denault, Kristin A.; George, Nathan C.; Doll, Courtney E.; Héry, Bathylle; Mikhailovsky, Alexander A.; Birkel, Christina S.; Hong, Byung-Chul; Seshadri, Ram (UCSB); (Mitsubishi)

2012-04-30T23:59:59.000Z

299

Business Case for Energy Efficiency in Support of Climate Change Mitigation, Economic and Societal Benefits in China  

E-Print Network [OSTI]

sites/china.lbl.gov/files/LBNL-3939E.pdf China Daily.2010. “China to subsidize 150m energy-efficient bulbs” JuneR. and Kang, A. , 2008. China's Booming Energy Efficiency

McNeil, Michael A.

2012-01-01T23:59:59.000Z

300

Indium-tin-oxide-free tris(8-hydroxyquinoline) Al organic light-emitting diodes with 80% enhanced power efficiency  

SciTech Connect (OSTI)

Efficient indium tin oxide (ITO)-free small molecule organic light-emitting diodes (SMOLEDs) with multilayered highly conductive poly(3,4-ethylenedioxy thiophene):poly(styrenesulfonate) (PEDOT:PSS) as the anode are demonstrated. PEDOT:PSS/MoO{sub 3}/N,N'-diphenyl- N,N'-bis(1-naphthylphenyl)-1,1'-biphenyl-4,4'-diamine (NPD)/tris(8-hydroxyquinoline) Al (Alq{sub 3})/4,7-diphenyl-1,10-phenanthroline (BPhen)/LiF/Al SMOLEDs exhibited a peak power efficiency of 3.82 lm/W, 81% higher than that of similar ITO-based SMOLEDs (2.11 lm/W). The improved performance is believed to be due to the higher work function, lower refractive index, and decreased surface roughness of PEDOT:PSS vs ITO, and to Ohmic hole injection from PEDOT:PSS to the NPD layer via the MoO{sub 3} interlayer. The results demonstrate that PEDOT:PSS can substitute ITO in SMOLEDs with strongly improved device performance.

Cai, Min; Xiao, Teng; Liu, Rui; Chen, Ying; Shinar, Ruth; Shinar, Joseph

2011-10-11T23:59:59.000Z

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Using interlayer step-wise triplet transfer to achieve an efficient white organic light-emitting diode with high color-stability  

SciTech Connect (OSTI)

An efficient phosphorescent white organic light emitting-diode with a red-green-blue tri-emitting-layer structure is reported. The host of the red dopant possesses a lower triplet-energy than the green dye. An interlayer step-wise triplet transfer via blue dye ? green dye ? red host ? red dye is achieved. This mechanism allows an efficient triplet harvesting by the three dopants, thus maintaining a balanced white light and reducing energy loss. Moreover, the color stability of the device is improved significantly. The white device not only achieves a peak external quantum efficiency of 21.1?±?0.8% and power efficiency of 37.5?±?1.4?lm/W but shows no color shift over a wide range of voltages.

Wang, Qi [State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022 (China); Department of Electrical Engineering and Computer Sciences, College of Engineering, South Dakota State University, Brookings, South Dakota 57007 (United States); Ma, Dongge, E-mail: mdg1014@ciac.jl.cn; Ding, Junqiao; Wang, Lixiang [State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022 (China); Leo, Karl [Tech. Univ. Dresden, Inst. Angew. Photophys., D-01062 Dresden (Germany); Qiao, Qiquan [Department of Electrical Engineering and Computer Sciences, College of Engineering, South Dakota State University, Brookings, South Dakota 57007 (United States); Jia, Huiping; Gnade, Bruce E. [Department of Materials Science and Engineering and Erik Jonsson School of Engineering and Computer Science, University of Texas at Dallas, Richardson, Texas 75083 (United States)

2014-05-12T23:59:59.000Z

302

E-Print Network 3.0 - accessory olfactory bulb Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

search results for: accessory olfactory bulb Page: << < 1 2 3 4 5 > >> 1 Dcculopmentul Brain Rescurch. 70 (1W2) 279-22 O 1992 Elsevier Science Publishers B.V.All rights reserved...

303

2.44a0005 Physiology of the Main Olfactory Bulb Matthew Ennis1  

E-Print Network [OSTI]

-inhibition 27 2.44.6.4.2 Lateral inhibition 27 2.44.6.4.3 Role of Ca2ţ influx through NMDA receptors and voltage.44.8 Neurophysiology of Primary Olfactory Cortical Inputs to Main Olfactory Bulb 29 2.44.9 Oscillations and Synchrony in Main Olfactory Bulb 29 2.44.9.1 Oscillations 29 2.44.9.1.1 Theta rhythm 30 2.44.9.1.2 Gamma rhythm 30 2

Hayar, Abdallah

304

Interrelationships between air velocity and natural wet-bulb thermometer response  

E-Print Network [OSTI]

INTERRELATIONSHIPS BETWEEN AIR VFLOCITY ANO NATURAL WET-BULB THERMOMETER RESPONSE A Thesis by NATHAN GLENN JONES Submitted to the Graduate Colleqe of Texas ASM University i n partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE AUGUST 1983 Major Subject: Industrial Hygiene INTERRELATIONSHIPS BETWEEN AIR VELOCITY AND NATURAL WET-BULB THERMOMETER RESPONSE A Thesis by NATHAN GLENN JONES Approved as to style an content by: airman o ommittee er Member ~~' A~ Member...

Jones, Nathan Glenn

1983-01-01T23:59:59.000Z

305

Origin of InGaN/GaN light-emitting diode efficiency improvements using tunnel-junction-cascaded active regions  

SciTech Connect (OSTI)

This Letter investigates the efficiency enhancement achieved by tunnel junction insertion into the InGaN/GaN multi-quantum well (MQW) active region of blue light emitting diodes (LEDs). The peak quantum efficiency of such LED exceeds 100%, but the maximum wall-plug efficiency (WPE) hardly changes. However, due to the increased bias, the WPE peaks at much higher input power, i.e., the WPE droop is significantly delayed, and the output power is strongly enhanced. The main physical reason for this improvement lies in the non-uniform vertical carrier distribution typically observed within InGaN MQWs.

Piprek, Joachim, E-mail: piprek@nusod.org [NUSOD Institute LLC, P.O. Box 7204, Newark, Delaware 19714 (United States)

2014-02-03T23:59:59.000Z

306

Comparison of technologies for new energy-efficient lamps  

SciTech Connect (OSTI)

Energy-efficient light bulbs are being developed to replace the incandescent lamp where they can satisfy the design criteria and be used in sockets that have long hours of annual use. The four technologies discussed here include the compact fluorescent lamp, coated-filament lamp, electrodeless fluorescent lamp, and compact high-intensity discharge lamp. The systems demonstrate efficacy improvements of two to four times that of their incandescent counterparts. These new lamps have required considerable advances in lamp technology. They offer the potential for achieving efficacies close to 80 lumens per watt. These new lamps will reduce the energy used annually by incandescent lamps (190 BkWh) by more than 50% in the 1990s, at which times they will be commonly employed.

Verderber, R.R.; Rubinstein, F.R.

1983-06-01T23:59:59.000Z

307

Comparison of technologies for new energy-efficient lamps  

SciTech Connect (OSTI)

Energy-efficient light bulbs are being developed to replace the incandescent lamp where they can satisfy the design criteria and be used in sockets that have long hours of annual use. The four technologies discussed include the compact fluorescent lamp, coated-filament lamp, electrodeless fluorescent lamp, and compact high-intensity discharge lamp. The systems demonstrate efficacy improvements of two to four times that of their incandescent counterparts. These new lamps have required considerable advances in lamp technology. They offer the potential for achieving efficacies close to 80 lm/W. These new lamps will reduce the energy used annually by incandescent lamps (190 billion kWh) by more than 50 percent in the 1990's, at which times they will be commonly employed.

Verderber, R.R.; Rubinstein, F.M.

1984-09-01T23:59:59.000Z

308

Analysis of the causes of the decrease in the electroluminescence efficiency of AlGaInN light-emitting-diode heterostructures at high pumping density  

SciTech Connect (OSTI)

The study is devoted to theoretical explanation of a decrease in the electroluminescence efficiency as the pump current increases, which is characteristic of light-emitting-diode (LED) heterostructures based on AlInGaN. Numerical simulation shows that the increase in the external quantum efficiency at low current densities J {approx} 1 A/cm{sup 2} is caused by the competition between radiative and nonradiative recombination. The decrease in the quantum efficiency at current densities J > 1 A/cm{sup 2} is caused by a decrease in the efficiency of hole injection into the active region. It is shown that the depth of the acceptor energy level in the AlGaN emitter, as well as low electron and hole mobilities in the p-type region, plays an important role in this effect. A modified LED heterostructure is suggested in which the efficiency decrease with the pump current should not occur.

Rozhansky, I. V., E-mail: igor@quantum.ioffe.ru; Zakheim, D. A. [Russian Academy of Sciences, Ioffe Physicotechnical Institute (Russian Federation)

2006-07-15T23:59:59.000Z

309

Development of Technologies for a High Efficiency, Very Low Emission, Diesel Engine for Light Trucks and Sport Utility Vehicles  

SciTech Connect (OSTI)

Cummins Inc., in partnership with the Department of Energy, has developed technology for a new highly efficient, very low emission, diesel engine for light trucks and sport utility vehicles. This work began in April 1997, and started with very aggressive goals for vehicles in the 5751 to 8500 pound GCW weight class. The primary program goals were as follows: (1) EMISSIONS -- NOx = 0.50 g/mi; PM = 0.05 g/mi; CO = 2.8 g/mi; and NMHC = 0.07 g/mi. California decided to issue new and even tougher LEV II light truck regulations late in 1999. EPA also issued its lower Tier 2 regulations late in 2000. The net result was that the targets for this diesel engine project were lowered, and these goals were eventually modified by the publication of Federal Tier 2 emission standards early in 2000 to the following: NOx = 0.07 g/mi; and PM = 0.01 g/mi. (2) FUEL ECONOMY -- The fuel economy goal was 50 percent MPG improvement (combined city/highway) over the 1997 gasoline powered light truck or sport utility vehicle in the vehicle class for which this diesel engine is being designed to replace. The goal for fuel economy remained at 50 percent MPG improvement, even with the emissions goal revisions. (3) COOPERATIVE DEVELOPMENT -- Regular design reviews of the engine program will be conducted with a vehicle manufacturer to insure that the concepts and design specifics are commercially feasible. (DaimlerChrysler has provided Cummins with this design review input.) Cummins has essentially completed a demonstration of proof-of-principle for a diesel engine platform using advanced combustion and fuel system technologies. Cummins reported very early progress in this project, evidence that new diesel engine technology had been developed that demonstrated the feasibility of the above emissions goals. Emissions levels of NOx = 0.4 g/mi and PM = 0.06 g/mi were demonstrated for a 5250 lb. test weight vehicle with passive aftertreatment only. These results were achieved using the full chassis dynamometer FTP-75 test procedure that allowed compliance with the Tier 2 Interim Bin 10 Standards and would apply to vehicles in MY2004 through MY2007 timeframe. In further technology development with active aftertreatment management, Cummins has been able to report that the emissions goals for the Tier 2 Bin 5 standards were met on an engine running the full FTP-75 test procedure. The fuel economy on the chassis tests was measured at over 59 percent MPG improvement over the gasoline engines that are offered in typical SUVs and light trucks. The above demonstration used only in-cylinder fueling for management of the aftertreatment system.

Stang, John H.

2005-12-19T23:59:59.000Z

310

Development of Technologies for a High Efficiency, Very Low Emission, Diesel Engine for Light Trucks and Sport Utility Vehicles  

SciTech Connect (OSTI)

Cummins Inc., in partnership with the Department of Energy, has developed technology for a new highly efficient, very low emission, diesel engine for light trucks and sport utility vehicles. This work began in April 1997, and started with very aggressive goals for vehicles in the 5751 to 8500 pound GCW weight class. The primary program goals were as follows: (1) EMISSIONS--NO{sub x} = 0.50 g/mi; PM = 0.05 g/mi; CO = 2.8 g/mi; and NMHC = 0.07 g/mi. California decided to issue new and even tougher LEV II light truck regulations late in 1999. EPA also issued its lower Tier 2 regulations late in 2000. The net result was that the targets for this diesel engine project were lowered, and these goals were eventually modified by the publication of Federal Tier 2 emission standards early in 2000 to the following: NO{sub x} = 0.07 g/mi; and PM = 0.01 g/mi. (2) FUEL ECONOMY--The fuel economy goal was 50 percent MPG improvement (combined city/highway) over the 1997 gasoline powered light truck or sport utility vehicle in the vehicle class for which this diesel engine is being designed to replace. The goal for fuel economy remained at 50 percent MPG improvement, even with the emissions goal revisions. (3) COOPERATIVE DEVELOPMENT--Regular design reviews of the engine program will be conducted with a vehicle manufacturer to insure that the concepts and design specifics are commercially feasible. (DaimlerChrysler has provided Cummins with this design review input.) Cummins has essentially completed a demonstration of proof-of-principle for a diesel engine platform using advanced combustion and fuel system technologies. Cummins reported very early progress in this project, evidence that new diesel engine technology had been developed that demonstrated the feasibility of the above emissions goals. Emissions levels of NOx = 0.4 g/mi and PM = 0.06 g/mi were demonstrated for a 5250 lb. test weight vehicle with passive aftertreatment only. These results were achieved using the full chassis dynamometer FTP-75 test procedure that allowed compliance with the Tier 2 Interim Bin 10 Standards and would apply to vehicles in MY2004 through MY2007 timeframe. In further technology development with active aftertreatment management, Cummins has been able to report that the emissions goals for the Tier 2 Bin 5 standards were met on an engine running the full FTP-75 test procedure. The fuel economy on the chassis tests was measured at over 59 percent MPG improvement over the gasoline engines that are offered in typical SUVs and light trucks. The above demonstration used only in-cylinder fueling for management of the aftertreatment system.

John H. Stang

2005-12-31T23:59:59.000Z

311

Polarization engineering via staggered InGaN quantum wells for radiative efficiency enhancement of light emitting diodes  

E-Print Network [OSTI]

of light emitting diodes Ronald A. Arif, Yik-Khoon Ee, and Nelson Tansu Citation: Appl. Phys. Lett. 91 extraction in GaN-based light emitting diodes Appl. Phys. Lett. 100, 061107 (2012) Electrically driven nanopyramid green light emitting diode Appl. Phys. Lett. 100, 061106 (2012) Ultraviolet electroluminescence

Gilchrist, James F.

312

Energy Efficiency Adult Tracking Report - Final  

SciTech Connect (OSTI)

Postwave tracking study for the Energy Efficiency Adult Campaign This study serves as measure of key metrics among the campaign’s target audience, homeowners age 25+. Key measures include: Awareness of messages relating to the broad issue; Recognition of the PSAs; Relevant attitudes, including interest, ease of taking energy efficient steps, and likelihood to act; Relevant knowledge, including knowledge of light bulb alternatives and energy efficient options; and Relevant behaviors, including specific energy-saving behaviors mentioned within the PSAs. Wave 1: May 27 – June 7, 2011 Wave 2: May 29 – June 8, 2012 Wave 3: May 29 – June 19, 2014 General market sample of adults 25+ who own their homes W1 sample: n = 704; W2: n=701; W3: n=806 Online Survey Panel Methodology Study was fielded by Lightspeed Research among their survey panel. Sample is US Census representative of US homeowners by race/ethnicity, income, age, region, and family status. At least 30% of respondents were required to have not updated major appliances in their home in the past 5 years (dishwasher, stove, refrigerator, washer, or dryer).

Gibson-Grant, Amy

2014-09-30T23:59:59.000Z

313

Investigating potential efficiency improvement for light-duty transportation applications through simulation of an organic Rankine cycle for waste-heat recovery  

SciTech Connect (OSTI)

Modern diesel engines used in light-duty transportation applications have peak brake thermal efficiencies in the range of 40-42% for high-load operation with substantially lower efficiencies at realistic road-load conditions. Thermodynamic energy and exergy analysis reveals that the largest losses from these engines are due to heat loss and combustion irreversibility. Substantial improvement in overall engine efficiency requires reducing or recovering these losses. Unfortunately, much of the heat transfer either occurs at relatively low temperatures resulting in large entropy generation (such as in the air-charge cooler), is transferred to low-exergy flow streams (such as the oil and engine coolant), or is radiated or convected directly to the environment. While there are significant opportunities for recovery from the exhaust and EGR cooler for heavy-duty applications, the potential benefits of such a strategy for light-duty applications are unknown due to transient operation, low-load operation at typical driving conditions, and the added mass of the system. We have developed an organic Rankine cycle model using GT-Suite to investigate the potential for efficiency improvement through waste-heat recovery from the exhaust and EGR cooler of a light-duty diesel engine. Results from steady-state and drive-cycle simulations are presented, and we discuss strategies to address operational difficulties associated with transient drive cycles and competition between waste-heat recovery systems, turbochargers, aftertreatment devices, and other systems for the limited thermal resources.

Edwards, Kevin Dean [ORNL; Wagner, Robert M [ORNL

2010-01-01T23:59:59.000Z

314

Arrays and Cascades of Fluorescent Liquid-Liquid Waveguides: Broadband Light Sources for  

E-Print Network [OSTI]

Arrays and Cascades of Fluorescent Liquid-Liquid Waveguides: Broadband Light Sources) microchannel waveguides with liquid cores containing fluorescent dyes, excited by incident light from an external halogen bulb. Simultaneous use of multiple fluorophores in a common solution, in a single L2 light

Prentiss, Mara

315

Stalled on the Road to the Market: Analysis of Field Experience with a Project to Promote Lighting Efficiency in India  

E-Print Network [OSTI]

several rea- sons: (1) incandescent lamps, the products thatin replacing an incandescent with a CFL is unmatched in anysame quantity of light as an incandescent lamp. The BELLE

Gadgil, A.J.

2008-01-01T23:59:59.000Z

316

Geaux Green: GREEN GUIDE  

E-Print Network [OSTI]

account. Make a switch Replace incandescent light bulbs with energy-efficient compact fluorescent lights. Remember: You should always turn your lights off regardless if they are incandescent bulbs or CFLs. Take

Harms, Kyle E.

317

Prospects for and problems of using light-water supercritical-pressure coolant in nuclear reactors in order to increase the efficiency of the nuclear fuel cycle  

SciTech Connect (OSTI)

Trends in the development of the power sector of the Russian and world power industries both at present time and in the near future are analyzed. Trends in the rise of prices for reserves of fossil and nuclear fuels used for electricity production are compared. An analysis of the competitiveness of electricity production at nuclear power plants as compared to the competitiveness of electricity produced at coal-fired and natural-gas-fired thermal power plants is performed. The efficiency of the open nuclear fuel cycle and various versions of the closed nuclear fuel cycle is discussed. The requirements on light-water reactors under the scenario of dynamic development of the nuclear power industry in Russia are determined. Results of analyzing the efficiency of fuel utilization for various versions of vessel-type light-water reactors with supercritical coolant are given. Advantages and problems of reactors with supercritical-pressure water are listed.

Alekseev, P. N.; Semchenkov, Yu. M.; Sedov, A. A., E-mail: sedov@dhtp.kial.ru; Subbotin, S. A.; Chibinyaev, A. V. [Russian Research Centre Kurchatov Institute (Russian Federation)

2011-12-15T23:59:59.000Z

318

A Winning Light Bulb With the Potential to Save the Nation Billions |  

Energy Savers [EERE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy UsageAUDITVehiclesTankless orA BRIEF HISTORY OF THE DEPARTMENT OF

319

Consumer Light Bulb Changes: Briefing and Resources for Media and Retailers  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:YearRound-Up fromDepartmentTieCelebrate Earth Codestheatfor Optimized91PowerCapacitorConsumer|

320

DOE Requires Westinghouse to Cease Sales of Two Light Bulb Models and  

Broader source: Energy.gov (indexed) [DOE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarly Career Scientists'Montana. DOCUMENTSof Energy DOEDOEAVAILABLEDepartment ofHeldViolating

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

DOE Withdraws the Energy Star Label from 34 Compact Fluorescent Light Bulbs  

Broader source: Energy.gov (indexed) [DOE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarly Career Scientists'Montana. DOCUMENTSof EnergyAlliance |Department ofShowerheads | Department|

322

Microsphere Light-Scattering Layer Assembled by ZnO Nanosheets for the Construction of High Efficiency (>5%) Quantum Dots  

E-Print Network [OSTI]

performance solar cells for sustainable energy sources to replace fossil fuels has become an urgent subject for CdS/CdSe quantum dot cosensitized solar cells (QDSCs) with a power conversion efficiency (PCE Efficiency (>5%) Quantum Dots Sensitized Solar Cells Jianjun Tian,*, Lili Lv, Xuyang Wang, Chengbin Fei

Cao, Guozhong

323

Volunteer Potato Density Influences Critical Time of Weed Removal in Bulb Onion  

E-Print Network [OSTI]

Volunteer Potato Density Influences Critical Time of Weed Removal in Bulb Onion Martin M. Williams II, Corey V. Ransom, and W. Mack Thompson* Volunteer potato is highly competitive with onion and few control tactics are effective for removing this weed from an onion crop. Both volunteer potato density

Sims, Gerald K.

324

Remarkably reduced efficiency droop by using staircase thin InGaN quantum barriers in InGaN based blue light emitting diodes  

SciTech Connect (OSTI)

The efficiency droop of InGaN/GaN(InGaN) multiple quantum well (MQW) light emitting diodes (LEDs) with thin quantum barriers (QB) is studied. With thin GaN QB (3?nm–6?nm thickness), the efficiency droop is not improved, which indicates that hole transport cannot be significantly enhanced by the thin GaN QBs. On the contrary, the efficiency droop was remarkably reduced by using a InGaN staircase QB (InGaN SC-QB) MQWs structure where InGaN SC-QBs lower the transport energy barrier of holes. The efficiency droop ratio was as low as 3.3% up to 200?A/cm{sup 2} for the InGaN SC-QB LED. By using monitoring QW with longer wavelength we observe a much uniform carrier distribution in the InGaN SC-QB LEDs, which reveals the mechanism of improvement in the efficiency droop.

Zhou, Kun; Ikeda, Masao, E-mail: mikeda2013@sinano.ac.cn, E-mail: jpliu2010@sinano.ac.cn; Liu, Jianping, E-mail: mikeda2013@sinano.ac.cn, E-mail: jpliu2010@sinano.ac.cn; Zhang, Shuming; Li, Deyao; Zhang, Liqun; Yang, Hui [Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou (China); Key Laboratory of Nanodevices and Applications, Chinese Academy of Sciences, Suzhou (China); Cai, Jin; Wang, Hui; Wang, H. B. [Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou (China); Key Laboratory of Nanodevices and Applications, Chinese Academy of Sciences, Suzhou (China); Suzhou Nanojoin Photonics Co., Ltd., Suzhou (China)

2014-10-27T23:59:59.000Z

325

Vehicle Technologies Office Merit Review 2014: High Efficiency Clean Combustion in Multi-Cylinder Light-Duty Engines  

Broader source: Energy.gov [DOE]

Presentation given by Oak Ridge National Laboratory at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about high efficiency...

326

The effect of a synthetic cytokinin, 6-benzylaminopurine, and light quality on Ficus benjamina under low light intensities  

E-Print Network [OSTI]

of artificial light sources, the effects of the different wavelengths have become more important, as artificial light sources do not emi t as wide a spectrum as does natural sunlight. Cool white fluorescent tubes have a high blue licht component, while i... higher dry weight gain than fluorescent plus tungsten plus mercury or fluorescent plus mercury, or fluor scent alone (23). Incandescent bulbs are high in infrared irradiation compared to fluorescent light sources, and it has been found that infrared 1r...

Meadows, Sylvia Elise

1979-01-01T23:59:59.000Z

327

Efficient energy transfer in light-harvesting systems, III: The influence of the eighth bacteriochlorophyll on the dynamics and efficiency in FMO  

E-Print Network [OSTI]

The most recent crystal structure of the Fenna-Matthews-Olson (FMO) protein complex indicates that each subunit contains an additional eighth chromophore. It has been proposed that this extra site functions as a link between the chlorosome antenna complex and the remaining seven chromophores in FMO [Schmidt am Busch et al, J. Phys. Chem. Lett., {\\bf 2}, 93 (2011)]. Here, we investigate the implications of this scenario through numerical calculations with the generalized Bloch-Redfield (GBR) equation and the non-interacting blip approximation (NIBA). Three key insights into the population dynamics and energy transfer efficiency in FMO are provided. First, it is shown that the oscillations that are often observed in the population relaxation of the dimer composed of sites one and two may be completely suppressed in the eight site model. The presence of the coherent oscillations is shown to depend upon the particular initial preparation of the dimer state. Secondly it is demonstrated that while the presence of the eighth chromophore does not cause a dramatic change in the energy transfer efficiency, it does however lead to a dominant energy transfer pathway which can be characterized by an effective three site system arranged in an equally spaced downhill configuration. Such a configuration leads to an optimal value of the site energy of the eighth chromophore which is shown to be near to its suggested value. Finally we confirm that the energy transfer process in the eight site FMO complex remains efficient and robust. The optimal values of the bath parameters are computed and shown to be closer to the experimentally fitted values than those calculated previously for the seven site system.

Jeremy Moix; Jianlan Wu; Pengfei Huo; David Coker; Jianshu Cao

2011-09-14T23:59:59.000Z

328

Design and Predictive Control of a Net Zero Energy Home  

E-Print Network [OSTI]

the same amount of light as traditional incandescent bulbs with less energy. Incandescent bulbs are inherently inefficient as most of the energy they consume goes towards heat generation. Compact fluorescent (CFL) and light emitting diode (LED) bulbs... as heat [1]. Compact fluorescent lamps (CFLs) and Light Emitting Diodes (LEDs) were analyzed in comparison with incandescent lamps. To determine the most energy efficient bulb, energy consumption for each type of bulb is needed. To do this, the amount...

Morelli, F.; Abbarno, N.; Boese, E.; Bullock, J.; Carter, B.; Edwards, R.; Lapite, O.; Mann, D.; Mulvihill, C.; Purcell, E.; Stein, M. IV; Rasmussen, B. P.

2013-01-01T23:59:59.000Z

329

System Architecture Directions for a Software-Defined Lighting Infrastructure  

E-Print Network [OSTI]

spectrum of an outdoor environment and a typical fluorescent tube-lit office space. Indoor spectrum to incandescent and fluorescent lights. Unfortunately, the remarkable march of semiconductor technology a renaissance. The staple of illumi- nation for one and a half centuries, the incandescent bulb, is being phased

Dutta, Prabal

330

DRIVE CYCLE EFFICIENCY AND EMISSIONS ESTIMATES FOR REACTIVITY CONTROLLED COMPRESSION IGNITION IN A MULTI-CYLINDER LIGHT-DUTY DIESEL ENGINE  

SciTech Connect (OSTI)

In-cylinder blending of gasoline and diesel to achieve Reactivity Controlled Compression Ignition (RCCI) has been shown to reduce NOx and PM emissions while maintaining or improving brake thermal efficiency as compared to conventional diesel combustion (CDC). The RCCI concept has an advantage over many advanced combustion strategies in that by varying both the percent of premixed gasoline and EGR rate, stable combustion can be extended over more of the light-duty drive cycle load range. Changing the percent premixed gasoline changes the fuel reactivity stratification in the cylinder providing further control of combustion phasing and pressure rise rate than the use of EGR alone. This paper examines the combustion and emissions performance of light-duty diesel engine using direct injected diesel fuel and port injected gasoline to carry out RCCI for steady-state engine conditions which are consistent with a light-duty drive cycle. A GM 1.9L four-cylinder engine with the stock compression ratio of 17.5:1, common rail diesel injection system, high-pressure EGR system and variable geometry turbocharger was modified to allow for port fuel injection with gasoline. Engine-out emissions, engine performance and combustion behavior for RCCI operation is compared against both CDC and a premixed charge compression ignition (PCCI) strategy which relies on high levels of EGR dilution. The effect of percent of premixed gasoline, EGR rate, boost level, intake mixture temperature, combustion phasing and pressure rise rate is investigated for RCCI combustion for the light-duty modal points. Engine-out emissions of NOx and PM were found to be considerably lower for RCCI operation as compared to CDC and PCCI, while HC and CO emissions were higher. Brake thermal efficiency was similar or higher for many of the modal conditions for RCCI operation. The emissions results are used to estimate hot-start FTP-75 emissions levels with RCCI and are compared against CDC and PCCI modes.

Curran, Scott [ORNL; Briggs, Thomas E [ORNL; Cho, Kukwon [ORNL; Wagner, Robert M [ORNL

2011-01-01T23:59:59.000Z

331

Further reduction of efficiency droop effect by adding a lower-index dielectric interlayer in a surface plasmon coupled blue light-emitting diode with surface metal nanoparticles  

SciTech Connect (OSTI)

Further reduction of the efficiency droop effect and further enhancements of internal quantum efficiency (IQE) and output intensity of a surface plasmon coupled, blue-emitting light-emitting diode (LED) by inserting a dielectric interlayer (DI) of a lower refractive index between p-GaN and surface Ag nanoparticles are demonstrated. The insertion of a DI leads to a blue shift of the localized surface plasmon (LSP) resonance spectrum and increases the LSP coupling strength at the quantum well emitting wavelength in the blue range. With SiO{sub 2} as the DI, a thinner DI leads to a stronger LSP coupling effect, when compared with the case of a thicker DI. By using GaZnO, which is a dielectric in the optical range and a good conductor under direct-current operation, as the DI, the LSP coupling results in the highest IQE, highest LED output intensity, and weakest droop effect.

Lin, Chun-Han; Su, Chia-Ying; Chen, Chung-Hui; Yao, Yu-Feng; Shih, Pei-Ying; Chen, Horng-Shyang; Hsieh, Chieh; Kiang, Yean-Woei, E-mail: ywkiang@ntu.edu.tw; Yang, C. C., E-mail: ccycc@ntu.edu.tw [Institute of Photonics and Optoelectronics, and Department of Electrical Engineering, National Taiwan University, 1, Section 4, Roosevelt Road, Taipei 10617, Taiwan (China); Kuo, Yang [Department of Energy and Refrigerating Air-Conditioning Engineering, Tung Nan University, 152 Beishen Road, Section 3, New Taipei City, 22202 Taiwan (China)

2014-09-08T23:59:59.000Z

332

Effects of metallic absorption and the corrugated layer on the optical extraction efficiency of organic light-emitting diodes  

E-Print Network [OSTI]

The absorption of a metallic cathode in OLEDs is analyzed by using FDTD calculation. As the light propagates parallel to the layer, the intensity of Ez polarization decreases rapidly. The intensity at 2.0 um from the dipole is less than a quarter of that at 0.5 um. The strong absorption by a cathode can be a critical factor when considering the increase of optical extraction by means of bending the optical layers. The calculation indicates that the corrugation of layers helps the guided light escape the guiding layer, but also increases the absorption into a metallic cathode. The final optical output power of the corrugated OLED can be smaller than that of the flat OLED. On the contrary, the corrugated structure with a non-absorptive cathode increases the optical extraction by nearly two times.

Lee, Baek-Woon

2011-01-01T23:59:59.000Z

333

Fermilab Today  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

maximum use of natural light, or simply use a different type of bulb. LED, or light-emitting diode, bulbs are gaining popularity as a versatile and energy-efficient product. When...

334

Mobile lighting apparatus  

DOE Patents [OSTI]

A mobile lighting apparatus includes a portable frame such as a moveable trailer or skid having a light tower thereon. The light tower is moveable from a stowed position to a deployed position. A hydrogen-powered fuel cell is located on the portable frame to provide electrical power to an array of the energy efficient lights located on the light tower.

Roe, George Michael; Klebanoff, Leonard Elliott; Rea, Gerald W; Drake, Robert A; Johnson, Terry A; Wingert, Steven John; Damberger, Thomas A; Skradski, Thomas J; Radley, Christopher James; Oros, James M; Schuttinger, Paul G; Grupp, David J; Prey, Stephen Carl

2013-05-14T23:59:59.000Z

335

Bell tests with photon-entanglement: LHV models and critical efficiencies at the light of Wigner-PDC optics  

E-Print Network [OSTI]

Within the Wigner-PDC picture of photon entanglement, detection "errors" are not independent (though they may look, on average), nor can they be controlled by means of a technological improvement on the detectors. Those two elements make possible the interpretation of experimental evidence without the need to exclude local realism: for that reason, we propose the abandonment of the usual (photon, particle-based) description of (PDC-generated) light states, in favour of an also quantum, but field-theoretical description (QED), a description that finds a one-to-one equivalent in the Wigner-PDC approach we have advocated in recent posts.

Rodriguez, David

2011-01-01T23:59:59.000Z

336

Bell tests with photon-entanglement: LHV models and critical efficiencies at the light of Wigner-PDC optics  

E-Print Network [OSTI]

Within the Wigner-PDC picture of photon entanglement, detection "errors" are not independent (though they may look, on average), nor can they be controlled by means of a technological improvement on the detectors. Those two elements make possible the interpretation of experimental evidence without the need to exclude local realism: for that reason, we propose the abandonment of the usual (photon, particle-based) description of (PDC-generated) light states, in favour of an also quantum, but field-theoretical description (QED), a description that finds a one-to-one equivalent in the Wigner-PDC approach we have advocated in recent posts.

David Rodriguez

2011-12-15T23:59:59.000Z

337

Assessing the Performance of LED-Based Flashlights Available in the Kenyan Off-Grid Lighting Market  

E-Print Network [OSTI]

30), 477-499. Efficient Lighting Initiative. 2004. Lighting Energy Bill, Internationalfor Energy-Efficient Lighting and Lawrence Berkeley National

Tracy, Jennifer

2010-01-01T23:59:59.000Z

338

In-Cylinder Fuel Blending of Gasoline/Diesel for Improved Efficiency and Lowest Possible Emissions on a Multi-Cylinder Light-Duty Diesel Engine  

SciTech Connect (OSTI)

In-cylinder fuel blending of gasoline/diesel fuel is investigated on a multi-cylinder light-duty diesel engine as a potential strategy to control in-cylinder fuel reactivity for improved efficiency and lowest possible emissions. This approach was developed and demonstrated at the University of Wisconsin through modeling and single-cylinder engine experiments. The objective of this study is to better understand the potential and challenges of this method on a multi-cylinder engine. More specifically, the effect of cylinder-to-cylinder imbalances, heat rejection, and in-cylinder charge motion as well as the potential limitations imposed by real-world turbo-machinery were investigated on a 1.9-liter four-cylinder engine. This investigation focused on one engine condition, 2300 rpm, 4.2 bar brake mean effective pressure (BMEP). Gasoline was introduced with a port-fuel-injection system. Parameter sweeps included gasoline-to-diesel fuel ratio, intake air mixture temperature, in-cylinder swirl number, and diesel start-of-injection phasing. In addition, engine parameters were trimmed for each cylinder to balance the combustion process for maximum efficiency and lowest emissions. An important observation was the strong influence of intake charge temperature on cylinder pressure rise rate. Experiments were able to show increased thermal efficiency along with dramatic decreases in oxides of nitrogen (NOX) and particulate matter (PM). However, indicated thermal efficiency for the multi-cylinder experiments were less than expected based on modeling and single-cylinder results. The lower indicated thermal efficiency is believed to be due increased heat transfer as compared to the model predictions and suggest a need for improved cylinder-to-cylinder control and increased heat transfer control.

Curran, Scott [ORNL] [ORNL; Prikhodko, Vitaly Y [ORNL] [ORNL; Wagner, Robert M [ORNL] [ORNL; Parks, II, James E [ORNL; Cho, Kukwon [ORNL] [ORNL; Sluder, Scott [ORNL] [ORNL; Kokjohn, Sage [University of Wisconsin, Madison] [University of Wisconsin, Madison; Reitz, Rolf [University of Wisconsin] [University of Wisconsin

2010-01-01T23:59:59.000Z

339

Efficient Energy Transfer in Light-Harvesting Systems, II: Quantum-Classical Comparison, Flux Network, and Robustness Analysis  

E-Print Network [OSTI]

Following the calculation of optimal energy transfer in thermal environment in our first paper (Wu et al., New J. Phys., 2010, 12, 105012), full quantum dynamics and leading-order `classical' hopping kinetics are compared in the seven-site Fenna-Matthews-Olson (FMO) protein complex. The difference between these two dynamic descriptions is due to higher-order quantum corrections. Two thermal bath models, classical white noise (the Haken-Strobl-Reineker model) and quantum Debye model, are considered. In the seven-site FMO model, we observe that higher-order corrections lead to negligible changes in the trapping time or in energy transfer efficiency around the optimal and physiological conditions (2% in the HSR model and 0.1% in the quantum Debye model for the initial site at BChl 1). However, using the concept of integrated flux, we can identify significant differences in branching probabilities of the energy transfer network between hopping kinetics and quantum dynamics (26% in the HSR model and 32% in the quantum Debye model for the initial site at BChl 1). This observation indicates that the quantum coherence can significantly change the distribution of energy transfer pathways in the flux network with the efficiency nearly the same. The quantum-classical comparison of the average trapping time with the removal of the bottleneck site, BChl 4, demonstrates the robustness of the efficient energy transfer by the mechanism of multi-site quantum coherence. To reconcile with the latest eight-site FMO model, the quantum-classical comparison with the flux network analysis is summarized in the appendix. The eight-site FMO model yields similar trapping time and network structure as the seven-site FMO model but leads to a more disperse distribution of energy transfer pathways.

Jianlan Wu; Fan Liu; Jian Ma; Robert J. Silbey; Jianshu Cao

2012-09-05T23:59:59.000Z

340

Carrier recombination mechanisms and efficiency droop in GaInN/GaN light-emitting diodes  

SciTech Connect (OSTI)

We model the carrier recombination mechanisms in GaInN/GaN light-emitting diodes as R=An+Bn{sup 2} +Cn{sup 3} +f(n) , where f(n) represents carrier leakage out of the active region. The term f(n) is expanded into a power series and shown to have higher-than-third-order contributions to the recombination. The total third-order nonradiative coefficient (which may include an f(n) leakage contribution and an Auger contribution) is found to be 8×10{sup ?29} ?cm{sup 6} ?s{sup ?1} . Comparison of the theoretical ABC+f(n) model with experimental data shows that a good fit requires the inclusion of the f(n) term.

Dai, Qi; Shan, Qifeng; Wang, Jing; Chhajed, Sameer; Cho, Jaehee; Schubert, E. Fred; Crawford, Mary H.; Koleske, Daniel D.; Kim, Min-Ho; Park, Yongjo

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

InGaAsBi alloys on InP for efficient near- and mid-infrared light emitting devices  

SciTech Connect (OSTI)

We present the band parameters such as band gap, spin-orbit splitting energy, band offsets and strain of InGaAsBi on InP based on recent experimental data. It is shown that InGaAsBi is promising for near- and mid-infrared photonic devices operating from 0.3–0.8?eV (1.5–4??m) on conventional InP substrates. We also show how bismuth may be used to form alloys whereby the spin-orbit splitting energy (?{sub SO}) is large and controllable and can, for example, be made larger than the band gap (E{sub g}) thereby providing a means of suppressing non-radiative hot-hole producing Auger recombination and inter-valence band absorption both involving the spin-orbit band. This is expected to improve the high-temperature performance and thermal stability of light emitting devices.

Jin, Shirong; John Sweeney, Stephen [Advanced Technology Institute and Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH (United Kingdom)

2013-12-07T23:59:59.000Z

342

Reading Municipal Light Department- Business Lighting Rebate Program  

Broader source: Energy.gov [DOE]

Reading Municipal Light Department (RMLD) offers incentives for non-residential customers to install energy efficient lights and sensors in existing facilities. In addition to rebates for the...

343

Investigation of a moly-oxide electrodeless discharge for lighting applications  

SciTech Connect (OSTI)

Due to the hazardous material designation of spent fluorescent bulbs on board naval vessels, the Naval Research Laboratory has been investigating alternative lighting concepts which are free of mercury. The ideal goal is an efficient, large volume source, which provides white light directly without the use of a phosphor coating. Experiments with a {mu}wave plasma reactor normally used to diamond growth at {approximately}40 Torr revealed that a combination of O{sub 2}, N{sub 2}, and a heated molybdenum puck led to intense plasma emission in the visible domain. As the reactor was not designed for lighting studies, the authors have been investigating the process in glass tubes with a re-entry geometry and RF driven coils. Results will be presented on the initial discovery, the role of moly-oxide in surface evaporation, and the favorable emission spectrum of atomic molybdenum for visible light. Initial studies of the RF system, including coil design, measured electron density, B-dot measurements, E-to-H transitions, and spectroscopic analysis of various compositions will also be discussed. Finally, the essential problem of a recycling process for the moly emitters from the glass walls back to the moderate pressure plasma using chlorine will be addressed.

Giuliani, J.L.; Meger, R.A.; Pechacek, R.E.; Hinshelwood, D.D.; Shamamian, V.; Butler, J.E.

1999-07-01T23:59:59.000Z

344

Highly stable and efficient tandem organic light-emitting devices with intermediate connectors using lithium amide as n-type dopant  

SciTech Connect (OSTI)

In this work, we report thermally decomposable lithium amide (LiNH{sub 2}) feasible to function as an effective n-type dopant for intermediate connectors in tandem organic light-emitting devices (OLEDs). Metallic lithium, which is released from the decomposition process of LiNH{sub 2}, is proved by X-ray photoelectron spectroscopy and responsible for n-type electrical doping of electron transporting materials. We demonstrate that tandem OLEDs using LiNH{sub 2} and Cs{sub 2}CO{sub 3} as n-type dopants, respectively, give a comparable electroluminescence efficiency and, moreover, the device with LiNH{sub 2} has far longer operational lifetime. The results therefore highlight the significance of selecting suitable n-type dopant in intermediate connectors to fabricate high-stability tandem OLEDs.

Zhou, Dong-Ying [Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123 (China); Department of Electrical and Computer Engineering and Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1 (Canada); Zu, Feng-Shuo; Shi, Xiao-Bo; Liao, Liang-Sheng, E-mail: h2aziz@uwaterloo.ca, E-mail: lsliao@suda.edu.cn [Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123 (China); Zhang, Ying-Jie; Aziz, Hany, E-mail: h2aziz@uwaterloo.ca, E-mail: lsliao@suda.edu.cn [Department of Electrical and Computer Engineering and Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Avenue West, Waterloo, Ontario N2L 3G1 (Canada)

2014-08-25T23:59:59.000Z

345

Second-generation PFBC systems research and development: Phase 2, Best efficiency approach in light of current data  

SciTech Connect (OSTI)

The low-Btu gas is produced in the carbonizer by pyrolysis/mild devolatilization of coal in a fluidized bed reactor. Because this unit operates at temperatures much lower than gasifiers currently under development, it also produces char residue. Left untreated, the fuel gas will contain hydrogen sulfide and sulfur-containing tar/light oil vapors; therefore, lime-based sorbents are injected into the carbonizer to catalytically enhance tar cracking and to capture sulfur as calcium sulfide. Sulfur is captured in situ, and the raw fuel gas is fired hot. Thus expensive, complex, fuel gas heat exchangers and chemical or sulfur-capturing bed cleanup systems that are part of the coal gasification combined-cycle plants now being developed are eliminated. The char and calcium sulfide produced in the carbonizer and contained in the fuel gas as elutriated particles are captured by high-temperature filters, rendering the fuel gas essentially particulate-free and able to meet New Source Performance Standards (NSPS). The captured material, with carbonizer bed drains, is collected in a central hopper and injected into the CPFBC through a nitrogen-aerated non-mechanical valve. The high excess air in the combustor transforms the calcium sulfide to sulfate, allowing its disposal with the normal CPFBC spent sorbent. In the CPFBC, the burning char heats the high-excess-air flue gas to 1600{degree}F; any surplus heat is transferred to the FBHE by the recirculation of solids (sorbent and coal fly ash) between the two units. Controlled recirculation is accomplished with cyclone separators and non-mechanical valves. The FBHE contains tube surfaces that cool the circulating solids. Because of the low fluidizing velocity in the FBHE ({le} 1/2 ft/s), the risk of tube erosion is virtually eliminated.

Robertson, A.; Burkhard, F.; Carli, G. [and others

1993-09-01T23:59:59.000Z

346

Lighting Options for Homes.  

SciTech Connect (OSTI)

This report covers many aspects of various lighting options for homes. Types of light sources described include natural light, artificial light, incandescent lamps, fluorescent lamps, and high intensity discharge lamps. A light source selection guide gives the physical characteristics of these, design considerations, and common applications. Color, strategies for efficient lighting, and types of lighting are discussed. There is one section giving tips for various situations in specific rooms. Rooms and types of fixtures are shown on a matrix with watts saved by using the recommended type lighting for that room and room location. A major emphasis of this report is saving energy by utilizing the most suitable, recommended lighting option. (BN)

Baker, W.S.

1991-04-01T23:59:59.000Z

347

Persistence of Energy Efficiency Behaviors over Time: Evidence from a Community-Based Program  

E-Print Network [OSTI]

Ways to Save Use energy- efficient lighting and appliances.natural lighting. Use an energy- efficient water heater andoff electronics, installing energy efficient lights, using

Whitsett, Donna D PhD; Justus, Hannah C; Steiner, Ellen; Duffy, Kevin

2013-01-01T23:59:59.000Z

348

Modifying the organic/electrode interface in Organic Solar Cells (OSCs) and improving the efficiency of solution-processed phosphorescent Organic Light-Emitting Diodes (OLEDs)  

SciTech Connect (OSTI)

Organic semiconductors devices, such as, organic solar cells (OSCs), organic light-emitting diodes (OLEDs) and organic field-effect transistors (OFETs) have drawn increasing interest in recent decades. As organic materials are flexible, light weight, and potentially low-cost, organic semiconductor devices are considered to be an alternative to their inorganic counterparts. This dissertation will focus mainly on OSCs and OLEDs. As a clean and renewable energy source, the development of OSCs is very promising. Cells with 9.2% power conversion efficiency (PCE) were reported this year, compared to < 8% two years ago. OSCs belong to the so-called third generation solar cells and are still under development. While OLEDs are a more mature and better studied field, with commercial products already launched in the market, there are still several key issues: (1) the cost of OSCs/OLEDs is still high, largely due to the costly manufacturing processes; (2) the efficiency of OSCs/OLEDs needs to be improved; (3) the lifetime of OSCs/OLEDs is not sufficient compared to their inorganic counterparts; (4) the physics models of the behavior of the devices are not satisfactory. All these limitations invoke the demand for new organic materials, improved device architectures, low-cost fabrication methods, and better understanding of device physics. For OSCs, we attempted to improve the PCE by modifying the interlayer between active layer/metal. We found that ethylene glycol (EG) treated poly(3,4-ethylenedioxythiophene): polystyrenesulfonate (PEDOT: PSS) improves hole collection at the metal/polymer interface, furthermore it also affects the growth of the poly(3- hexylthiophene) (P3HT):phenyl-C61-butyric acid methyl ester (PCBM) blends, making the phase segregation more favorable for charge collection. We then studied organic/inorganic tandem cells. We also investigated the effect of a thin LiF layer on the hole-collection of copper phthalocyanine (CuPc)/C70-based small molecular OSCs. A thin LiF layer serves typically as the electron injection layer in OLEDs and electron collection interlayer in the OSCs. However, several reports showed that it can also assist in holeinjection in OLEDs. Here we first demonstrate that it assists hole-collection in OSCs, which is more obvious after air-plasma treatment, and explore this intriguing dual role. For OLEDs, we focus on solution processing methods to fabricate highly efficient phosphorescent OLEDs. First, we investigated OLEDs with a polymer host matrix, and enhanced charge injection by adding hole- and electron-transport materials into the system. We also applied a hole-blocking and electron-transport material to prevent luminescence quenching by the cathode. Finally, we substituted the polymer host by a small molecule, to achieve more efficient solution processed small molecular OLEDs (SMOLEDs); this approach is cost-effective in comparison to the more common vacuum thermal evaporation. All these studies help us to better understand the underlying relationship between the organic semiconductor materials and the OSCs and OLEDs’ performance and will subsequently assist in further enhancing the efficiencies of OSCs and OLEDs. With better efficiency and longer lifetime, the OSCs and OLEDs will be competitive with their inorganic counterparts.

Xiao, Teng

2012-04-27T23:59:59.000Z

349

Scaling Up: Kilolumen Solid-State Lighting Exceeding 100 LPW via Remote Phosphor  

SciTech Connect (OSTI)

This thirty-month project was successful in attaining its ambitious objectives of demonstrating a radically novel 'remote-phosphor' LED light source that can out-perform conventional conformal coated phosphor LED sources. Numerous technical challenges were met with innovative techniques and optical configurations. This product development program for a new generation of solid-state light sources has attained unprecedented luminosity (over 1 kilo-lumen) and efficacy (based on the criterion lumens per 100mw radiant blue). LPI has successfully demonstrated its proprietary technology for optical synthesis of large uniform sources out of the light output of an array of separated LEDs. Numerous multiple blue LEDs illuminate single a phosphor patch. By separating the LEDs from the phosphor, the phosphor and LEDs operate cooler and with higher efficiency over a wide range of operating conditions (from startup to steady state). Other benefits of the system include: better source uniformity, more types of phosphor can be used (chemical interaction and high temperatures are no longer an issue), and the phosphor can be made up from a pre-manufactured sheet (thereby lowering cost and complexity of phosphor deposition). Several laboratory prototypes were built and operated at the expected high performance level. The project fully explored two types of remote phosphor system: transmissive and reflective. The first was found to be well suited for a replacement for A19 type incandescent bulbs, as it was able to replicate the beam pattern of a traditional filament bulb. The second type has the advantages that it is pre-collimate source that has an adjustable color temperature. The project was divided in two phases: Phase I explored a transmissive design and Phase II of the project developed reflective architectures. Additionally, in Phase II the design of a spherical emitting transmissive remote phosphor bulb was developed that is suitable for replacement of A19 and similar light bulbs. In Phase II several new reflective remote phosphor systems were developed and patents applied for. This research included the development of reflective systems in which the short-pass filter operated at a nominal incidence angle of 15{sup o}, a major advancement of this technology. Another goal of the project was to show that it is possible to align multiple optics to multiple LEDs (spaced apart for better thermal management) to within an accuracy in the z-direction of 10 microns or less. This goal was achieved. A further goal was to show it is possible to combine and homogenize the output from multiple LEDs without any flux loss or significant increase in etendue. This goal also was achieved. The following color-coded computer drawing of the Phase 2 reflective remote phosphor prototype gives an idea of the accuracy challenges encountered in such an assembly. The actual setup has less functional clarity due to the numerous items of auxiliary equipment involved. Not only did 10 degrees of freedoms alignment have to be supplied to the LEDs and component prisms as well, but there were also micro-titrating glue dispensers and vacuum hoses. The project also utilized a recently introduced high-index glass, available in small customized prisms. This prototype also embodies a significant advance in thin-film design, by which an unprecedented 98% single-pass efficiency was attained over a 30 degree range of incidence angle (Patents Pending). Such high efficiency is especially important since it applies to the blue light going to the phosphor and then again to the phosphor's light, so that the 'system' efficiency associated with short-pass filter was 95.5%. Other losses have to be kept equally small, towards which a new type of ultra-clear injection-moldable acrylic was discovered and used to make ultra-transparent CPC optics. Several transmissive remote phosphor prototypes were manufactured that could replace screw-in type incandescent bulbs. The CRI of the white light from these prototypes varied from 55 to 93. The system efficiency achieved was between 27 to 29.5

Waqidi Falicoff

2008-09-15T23:59:59.000Z

350

Energy Efficiency and Conservation Block Grant Program  

Broader source: Energy.gov (indexed) [DOE]

andor streetlights in residential areas with energy efficient technologies, light-emitting diode lights, and install new light poles, as needed. Conditions: None Categorical...

351

U.S. Energy Information Administration (EIA) - Sector  

Gasoline and Diesel Fuel Update (EIA)

replacement of incandescent bulbs with more efficient compact fluorescent lighting and light-emitting diode (LED) lamps. Among electric end-use services in the residential...

352

Product Quality Assurance for Off-Grid Lighting in Africa  

SciTech Connect (OSTI)

Although the emergence of markets for high efficiency off-grid lighting technologies holds promise, realizing the potential of this opportunity on a long-term, sustainable basis requires careful attention to issues of product quality, consumer protection, and the potential for significant 'market spoiling', in anticipation of increases of sales of low cost, low performance off-grid lighting products. The goal of the Lighting Africa quality assurance workshop was to articulate strategies to mitigate the dangers of market spoiling and to explore ways to protect consumers from misleading advertising for sales of inferior, off-grid lighting products in the context of Lighting Africa's overarching objective to support the industry in developing a robust off-grid lighting market in Africa. The workshop resulted in the identification of two strategic approaches for meeting Lighting Africa quality assurance programmatic needs. The first strategy is intended to meet a short-term programmatic need for quality associated with requests for lighting products by bulk procurement agents, such as in a World Bank-financed project. The development of procurement specifications and test procedures that could be used in a quality/usability screening method in order to provide guidance for forthcoming large volume purchases emerged as the best solution to meet this need. Such approaches are used in World Bank-financed solar home systems (SHSs) projects in Bangladesh, Sri Lanka, and China, among others. However, unlike the SHSs which have multiple balance-of-system (BOS) components warranting the need for an array of specifications for individual components, stand alone lighting systems require specifications that are amenable to individual light points. To test this approach, Lighting Africa elected to use the technical specifications issued by the Photovoltaic Global Approval Program for solar lanterns that use CFL bulbs (PVRS11A) as the basis of qualifying such products. A contract has been competitively awarded to the Global Approval Program for Photovoltaics (PV GAP) under the Lighting Africa Program to select and test ten solar lantern product models. Lantern selection will be determined based on a number of criteria, among them, the ability to provide a daily duty cycle of at least 3 hours of light, the number of days of autonomy of battery, the volume of sales (especially in Africa), and whether or not the manufacturing facility is ISO 9000 certified. Those that are confirmed as meeting the specifications may be eligible to receive a PVGAP quality seal. The work is being carried out in partnership with the Photovoltaic and Wind Quality Test Center in Beijing, China and TUV Rhineland in Koeln, Germany. As off-grid LED-based stand-alone lighting products is in a nascent stage of development compared to CFL-based lanterns, Lighting Africa will support the development of a 'Quality Screening' approach to selecting LED lighting, in order not to delay consumers benefiting from such advances. The screening methodology could be used by procurement agencies to qualify LED lighting products for bulk or programmatic procurements. The main elements of this work comprises of developing a procurement specification and test procedure for undertaking a 'quick' quality/usability screening to be used for procuring LED lights and to test up to 30 LED-based lights to screen products that meet the requirement. The second strategy is intended to meet a longer-term need associated with creating a self-sustaining product quality assurance program that will effectively protect the African consumer, prevent significant market spoiling, adapt with expected technological advancements over the long-term--in other words, give consumers the ability to detect quality products and the information needed to find products that meet their specific needs from among the myriad of lighting products that become available commercially. Workshop discussions and the discussions evolving from the workshop led the Lighting Africa team to opt for an approach similar to that of th

World Bank; Mills, Evan; Mills, Evan

2008-07-13T23:59:59.000Z

353

Energy Efficiency and Conservation Block Grant Program  

Broader source: Energy.gov (indexed) [DOE]

including HVAC efficiency improvements, high efficiency lighting upgrade and wastewater treatment plant pump replacement, 4) install computer power management software,...

354

Lakeview Light and Power- Commercial Lighting Rebate Program  

Broader source: Energy.gov [DOE]

Lakeview Light and Power offers a commercial lighting rebate program. Rebates apply to the installation of energy efficient lighting retrofits in non-residential buildings. The rebate program is...

355

VIDEO: Who Was the Better Inventor, Tesla or Edison? | Department...  

Broader source: Energy.gov (indexed) [DOE]

energy future, energy efficient lighting, like LED bulbs, and more efficient electric motors not only help us save money on electricity costs but help combat climate change....

356

Energy Efficiency Fund (Electric)- Commercial and Industrial Energy Efficiency Programs  

Broader source: Energy.gov [DOE]

All Connecticut Utilities implement electric and gas efficiency rebate programs funded by Connecticut's public benefits charge through the Energy Efficiency Fund. The Connecticut Light and Power...

357

ENTRY LOBBY ENERGY EFFICIENCY  

E-Print Network [OSTI]

ENTRY LOBBY ENERGY EFFICIENCY Clerestory windows provide natural day-lighting.· Exterior roof SUSTAINABILITY FEATURES #12;ADMINISTRATION ENERGY EFFICIENCY High performance window glazing· minimizes heat gain ENERGY EFFICIENCY High performance window glazing· minimizes heat gain. Light-colored roofing reflects

Escher, Christine

358

Ag/AgBr/g-C{sub 3}N{sub 4}: A highly efficient and stable composite photocatalyst for degradation of organic contaminants under visible light  

SciTech Connect (OSTI)

Graphical abstract: Ag/AgBr/g-C{sub 3}N{sub 4} composite photocatalysts displayed excellent photocatalytic activities on the degradation of methyl orange (MO) under visible light. The improved photocatalytic performance and stability of Ag/AgBr/g-C{sub 3}N{sub 4} originated from the synergetic effects of AgBr/g-C{sub 3}N{sub 4} interface and metallic Ag nanoparticles. ·O{sub 2}?, one of the reactive species, was responsible for the photodegradation of MO compared to H+ and ·OH. - Highlights: • Novel Ag/AgBr/g-C{sub 3}N{sub 4} composite photocatalyst was reported. • Ag/AgBr/g-C{sub 3}N{sub 4} had novel energy band combination between AgBr and g-C{sub 3}N{sub 4}. • Synergetic effects of AgBr/g-C{sub 3}N{sub 4} interface and metallic Ag nanoparticles. • Electron trapping role of metallic Ag dominated the stability of Ag/AgBr/g-C{sub 3}N{sub 4}. - Abstract: Novel Ag/AgBr/g-C{sub 3}N{sub 4} composite photocatalysts were constructed via deposition–precipitation method and extensively characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM) and UV–vis diffuse reflectance spectroscopy (DRS). Under visible light (? > 420 nm), Ag/AgBr/g-C{sub 3}N{sub 4} composite photocatalysts displayed much higher photocatalytic activities than those of Ag/AgBr and g-C{sub 3}N{sub 4} for degradation of methyl orange (MO). 50% Ag/AgBr/g-C{sub 3}N{sub 4} presented the best photocatalytic performance, which was mainly attributed to the synergistic effects of AgBr/g-C{sub 3}N{sub 4} interface and the in situ metallic Ag nanoparticles for efficiently separating electron–hole pairs. Furthermore, Ag/AgBr/g-C{sub 3}N{sub 4} remained good photocatalytic activity through 5 times of cycle experiments. Additionally, the radical scavengers experiment indicated that ·O{sub 2}{sup ?} was the main reactive species for the MO degradation under visible light.

Cao, Jing, E-mail: caojing@mail.ipc.ac.cn [College of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui (China); State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100 (China); Zhao, Yijie; Lin, Haili; Xu, Benyan [College of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui (China); Chen, Shifu, E-mail: chshifu@chnu.edu.cn [College of Chemistry and Materials Science, Huaibei Normal University, Huaibei 235000, Anhui (China)

2013-10-15T23:59:59.000Z

359

Estimate of Technical Potential for Minimum Efficiency Performance Standards in 13 Major World Economies  

E-Print Network [OSTI]

for typical wattage of incandescent bulbs and hours of usagefor which we assume that incandescent bulbs gradually getsimilar to that of incandescent or fluorescent bulbs. These

Letschert, Virginie

2013-01-01T23:59:59.000Z

360

Impact of Large Scale Energy Efficiency Programs On Consumer Tariffs and Utility Finances in India  

E-Print Network [OSTI]

consumers to replace incandescent bulbs with CFLs. Weprograms (for example, incandescent bulbs) and j indicatesend-use (for example, incandescent bulbs) in 2011 and, T c

Abhyankar, Nikit

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Light Duty Efficient Clean Combustion  

Broader source: Energy.gov (indexed) [DOE]

(order of the components) Thermal management strategy Fuel injection strategies VGT turbo operation VVA 13 This presentation does not contain any proprietary or confidential...

362

Guide to Energy Efficient Lighting  

Broader source: Energy.gov (indexed) [DOE]

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarly Career Scientists'Montana.ProgramJulietip sheetK-4 SubjectField Workers2 December. Step 1 -8. Guide

363

Solid-State lighting ReSeaRch & development at Sandia national laboRatoRieS  

E-Print Network [OSTI]

illumination via interface with microelectronics. MASSIVE ENERGY SAVINGS Incandescent and fluorescent lamps% efficient. Today's commercially available white LEDs are already five times as efficient as incandescent--or 10-15 times that of incandescent bulbs and 2-3 times that of fluorescents. BIG BOTTOM-LINE PAYOFF

364

High Efficiency m-plane LEDs on Low Defect Density Bulk GaN Substrates  

SciTech Connect (OSTI)

Solid-state lighting is a key technology for reduction of energy consumption in the US and worldwide. In principle, by replacing standard incandescent bulbs and other light sources with sources based on light-emitting diodes (LEDs), ultimate energy efficiency can be achieved. The efficiency of LEDs has improved tremendously over the past two decades, however further progress is required for solid- state lighting to reach its full potential. The ability of an LED at converting electricity to light is quantified by its internal quantum efficiency (IQE). The material of choice for visible LEDs is Gallium Nitride (GaN), which is at the basis of blue-emitting LEDs. A key factor limiting the performance of GaN LEDs is the so-called efficiency droop, whereby the IQE of the LED decreases significantly at high current density. Despite decades of research, efficiency droop remains a major issue. Since high-current operation is necessary for practical lighting applications, reducing droop is a major challenge for the scientific community and the LED industry. Our approach to solving the droop issue is the use of newly available low-defect-density bulk GaN non-polar substrates. In contrast to the standard foreign substrates (sapphire, silicon carbide, silicon) used in the industry, we have employed native bulk GaN substrates with very low defect density, thus ensuring exquisite material quality and high IQE. Whereas all commercial LEDs are grown along the c-plane crystal direction of GaN, we have used m-plane non-polar substrates; these drastically modify the physical properties of the LED and enable a reduction of droop. With this approach, we have demonstrated very high IQE performance and low droop. Our results focused on violet and blue LEDs. For these, we have demonstrated very high peak IQEs and current droops of 6% and 10% respectively (up to a high current density of 200A.cm-2). All these results were obtained under electrical operation. These high IQE and low droop values are in line with the program’s milestones. They demonstrate that bulk non-polar GaN substrates represent a disruptive technology for LED performance. Application of this technology to real-world products is feasible, provided that the cost of GaN substrates is compatible with the market’s requirement.

David, Aurelien

2012-10-15T23:59:59.000Z

365

Protocol for Maximizing Energy Savings and Indoor Environmental Quality Improvements when Retrofitting Apartments  

E-Print Network [OSTI]

bulbs with compact fluorescent bulbs.  In addition, the a?light bulbs with  fluorescent light bulbs that use less light  bulbs  with  compact  fluorescent lights   Replace 

Noris, Federico

2014-01-01T23:59:59.000Z

366

Energy Department Announces Indoor Lighting Winners of Next Generation...  

Broader source: Energy.gov (indexed) [DOE]

was launched in 2008 to promote excellence in the design of energy-efficient light-emitting diode (LED) commercial lighting fixtures or "luminaires." Solid-state lighting...

367

Energy Consumption, Efficiency, Conservation, and Greenhouse Gas Mitigation in Japan's Building Sector  

E-Print Network [OSTI]

and a washroom with bulb-type fluorescent lamps, (5) closingusing incandescent bulbs to fluorescent lamps. This switch

2006-01-01T23:59:59.000Z

368

The Influence of Photoperiod History on Circadian Response to Light  

E-Print Network [OSTI]

by broad spectrum white fluorescent bulbs (F4T5) (105 µby broad spectrum white fluorescent bulbs (F4T5) (105 µused broad spectrum white fluorescent bulbs (F4T5) (105 µW/

Glickman, Gena Lynne

369

A Bright Idea: New Efficiency Standards for Incandescent and...  

Broader source: Energy.gov (indexed) [DOE]

A Bright Idea: New Efficiency Standards for Incandescent and Fluorescent Lights A Bright Idea: New Efficiency Standards for Incandescent and Fluorescent Lights July 21, 2009 -...

370

Visualization of nitric oxide production in the mouse main olfactory bulb by a cell-trappable copper(II) fluorescent probe  

E-Print Network [OSTI]

We report the visualization of NO production using fluorescence in tissue slices of the mouse main olfactory bulb. This discovery was possible through the use of a novel, cell-trappable probe for intracellular nitric oxide ...

McQuade, Lindsey E.

371

Legislative Directive: EPACT 2005, Subtitle A: Energy Efficiency  

Broader source: Energy.gov [DOE]

Legislative Directive: EPACT 2005, Subtitle A: Energy Efficiency, Sec. 911: Energy Efficiency, Sec. 912: Next Generation Lighting Initiative

372

Bringing climate change down to earth : science and participation in Canadian and Australian climate change campaigns  

E-Print Network [OSTI]

bulbs with compact fluorescent bulbs. This led to a fair bitsuch as compact fluorescent bulbs, low-flow showerheads, andtechnologies: compact fluorescent light bulbs, energy saving

Padolsky, Miriam Elana

2006-01-01T23:59:59.000Z

373

--No Title--  

Broader source: Energy.gov (indexed) [DOE]

light emitting diodes (LED) bulbs or other technology of equal or greater energy efficiency. The Township of Manheim intends to bid and complete the LED traffic signal...

374

Building Technologies Program - 1995 Annual Report  

E-Print Network [OSTI]

more efficient than typical incandescent lamps (17 lpw),near term with the ubiquitous incandescent light bulb in theyet fit in virtually any incandescent socket. Emboldened by

Selkowitz, S.E.

2010-01-01T23:59:59.000Z

375

1  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

potentially provide many advantages over standard lighting technologies, such as incandescent bulbs, especially in the areas of efficiency, - 2 - operating lifetime and the...

376

U.S. Department of Energy NEPA Categorical Exclusion Determination...  

Broader source: Energy.gov (indexed) [DOE]

and replace overhead garage doors at Fire Station 1, and 6) Energy Efficiency Fair and light bulb giveaway. Conditions: Historic preservation clause applies to this application...

377

U.S. Department of Energy NEPA Categorical Exclusion Determination...  

Broader source: Energy.gov (indexed) [DOE]

of the audits (APPROVAL EXCLUDES BUILDING RETROFITS) and distribute compact fluorescent light bulbs and other energy efficiency technology to tribal homes (up to 1000 homes)...

378

Energy Savings Estimates of Light Emitting Diodes in Niche Lighting...  

Office of Environmental Management (EM)

in Niche Lighting Applications Prepared for: Building Technologies Program Office of Energy Efficiency and Renewable Energy U.S. Department of Energy Prepared by: Navigant...

379

Enhanced coupling of light from organic light emitting diodes using nanoporous films  

E-Print Network [OSTI]

Enhanced coupling of light from organic light emitting diodes using nanoporous films H. J. Peng, Y the light extraction efficiency for organic light emitting diode OLED . Nanoporous alumina film was used by Bragg scattering. The corrugated light- emitting diode had two-times the efficiency as compared

380

Energy Efficiency and Conservation Block Grant Program  

Broader source: Energy.gov (indexed) [DOE]

efficient retrofits to include lighting system retrofits, HVAC systems, and water conservation in the Township Civic Center and 2) lighting retrofits in the Central Fire Station...

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Energy Efficiency and Conservation Block Grant Program  

Broader source: Energy.gov (indexed) [DOE]

energy storage technologies; 7) replace streetlights with energy efficient light-emitting diode lighting; and 8) work with the Tallahassee Housing Authority to purchase 40-50...

382

Residential Lighting  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared atEffectquestionnairesU.S. EnergyEnergy EfficiencyLighting

383

Office Lighting: Title 24 & Technology Update  

E-Print Network [OSTI]

Office Lighting: Title 24 & Technology Update Kelly Cunningham Outreach Director kcunning@ucdavis.edu California Lighting Technology Center, UC Davis RESEARCH . INNOVATION . PARTNERSHIP Supporting compliance apply the Title 24 Building Energy Efficiency Standards code requirements specific to lighting

California at Davis, University of

384

Beyond the Replacement Paradigm: Smart Lighting  

E-Print Network [OSTI]

Switches · Smart Building & Grid Interfaces · Efficient full spectrum LEDs without droop · Versatile, low - Visible Light Communications Integration of smart fixtures, networked sensors and control systemsBeyond the Replacement Paradigm: Smart Lighting Robert F. Karlicek, Jr. Director, Smart Lighting

Salama, Khaled

385

ANALYSIS OF THE CALIFORNIA ENERGY INDUSTRY  

E-Print Network [OSTI]

firms currently producing fluorescent bulbs. Phantom™ tubea per- centage of fluorescent light bulbs from the installed

Authors, Various

2010-01-01T23:59:59.000Z

386

Analysis of the Chinese Market for Building Energy Efficiency  

SciTech Connect (OSTI)

China will account for about half of the new construction globally in the coming decade. Its floorspace doubled from 1996 to 2011, and Chinese rural buildings alone have as much floorspace as all of U.S. residential buildings. Building energy consumption has also grown, increasing by over 40% since 1990. To curb building energy demand, the Chinese government has launched a series of policies and programs. Combined, this growth in buildings and renovations, along with the policies to promote green buildings, are creating a large market for energy efficiency products and services. This report assesses the impact of China’s policies on building energy efficiency and on the market for energy efficiency in the future. The first chapter of this report introduces the trends in China, drawing on both historical analysis, and detailed modeling of the drivers behind changes in floorspace and building energy demand such as economic and population growth, urbanization, policy. The analysis describes the trends by region, building type and energy service. The second chapter discusses China’s policies to promote green buildings. China began developing building energy codes in the 1980s. Over time, the central government has increased the stringency of the code requirements and the extent of enforcement. The codes are mandatory in all new buildings and major renovations in China’s cities, and they have been a driving force behind the expansion of China’s markets for insulation, efficient windows, and other green building materials. China also has several other important policies to encourage efficient buildings, including the Three-Star Rating System (somewhat akin to LEED), financial incentives tied to efficiency, appliance standards, a phasing out of incandescent bulbs and promotion of efficient lighting, and several policies to encourage retrofits in existing buildings. In the third chapter, we take “deep dives” into the trends affecting key building components. This chapter examines insulation in walls and roofs; efficient windows and doors; heating, air conditioning and controls; and lighting. These markets have seen significant growth because of the strength of the construction sector but also the specific policies that require and promote efficient building components. At the same time, as requirements have become more stringent, there has been fierce competition, and quality has at time suffered, which in turn has created additional challenges. Next we examine existing buildings in chapter four. China has many Soviet-style, inefficient buildings built before stringent requirements for efficiency were more widely enforced. As a result, there are several specific market opportunities related to retrofits. These fall into two or three categories. First, China now has a code for retrofitting residential buildings in the north. Local governments have targets of the number of buildings they must retrofit each year, and they help finance the changes. The requirements focus on insulation, windows, and heat distribution. Second, the Chinese government recently decided to increase the scale of its retrofits of government and state-owned buildings. It hopes to achieve large scale changes through energy service contracts, which creates an opportunity for energy service companies. Third, there is also a small but growing trend to apply energy service contracts to large commercial and residential buildings. This report assesses the impacts of China’s policies on building energy efficiency. By examining the existing literature and interviewing stakeholders from the public, academic, and private sectors, the report seeks to offer an in-depth insights of the opportunities and barriers for major market segments related to building energy efficiency. The report also discusses trends in building energy use, policies promoting building energy efficiency, and energy performance contracting for public building retrofits.

Yu, Sha; Evans, Meredydd; Shi, Qing

2014-03-20T23:59:59.000Z

387

LED Lighting Retrofit  

E-Print Network [OSTI]

? Municipal Street Lighting Consortium ? American Public Power Association (APPA) ? Demonstration in Energy Efficiency Development (DEED) ? Source of funding and database of completed LED roadway projects 6 Rules of the Road ESL-KT-11-11-57 CATEE 2011..., 2011 ? 9 Solar-Assisted LED Case Study LaQuinta Hotel, Cedar Park, Texas ? Utilizes 18 - ActiveLED Solar-Assisted Parking Lot Lights ? Utilizes ?power management? to extend battery life while handling light output ? Reduces load which reduces PV...

Shaw-Meadow, N.

2011-01-01T23:59:59.000Z

388

Roseville Electric- Commercial Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Roseville Electric offers incentives for its commercial customers to increase the efficiency of existing facilities. Rebates are offered for energy efficient lighting equipment, HVAC system...

389

Energy Efficiency and Conservation Block Grant Program  

Broader source: Energy.gov (indexed) [DOE]

neutral public facility with installation of solar photovoltaic, solar heating, energy efficiency HVAC, energy efficiency lighting and energy star products; and 4) replace LED...

390

Energy Efficiency and Conservation Block Grant Program  

Broader source: Energy.gov (indexed) [DOE]

4) Police Headquarters green roof, 5) Sanitation Building green roof, 6) energy efficiency retrofits to the Peacock Building which will include energy efficiency lighting;...

391

Energy Efficiency and Conservation Block Grant Program  

Broader source: Energy.gov (indexed) [DOE]

American Recovery and Reinvestment Act: Proposed Action or Project Description 1) Energy efficiency and conservation strategy, 2) energy efficiency lighting retrofits of Martin...

392

Largely Enhanced Efficiency in ZnO Nanowire/p-Polymer Hybridized Inorganic/Organic Ultraviolet Light-Emitting Diode by Piezo-  

E-Print Network [OSTI]

of Technology, Atlanta, Georgia 30332-0245, United States Key Laboratory of Modern Optical InstrumentationO nanostructures has been limited by a lack of efficient methods to achieve a balance between electron contributed, and energy harvesting.1-5 With a direct band gap of about 3.30 eV, a large excitonic binding energy about 60

Wang, Zhong L.

393

Essays in Public Economics and Development  

E-Print Network [OSTI]

adopt compact fluorescent light bulbs (CFLs), and possibleof compact fluorescent light bulbs (CFLs) from PROCEL, andAdoption of compact fluorescent light bulbs In the PROCEL

Gerard, Francois

2013-01-01T23:59:59.000Z

394

Buildings Energy Efficiency Policy  

E-Print Network [OSTI]

Efficiency Wind Biomass Natural Gas Combined Cycle Nuclear Coal IGCC Photovoltaics Rangeof · Emphasized lighting · Insulation, HVAC, motors, windows also significant · Savings typically 1-10% per

Oak Ridge National Laboratory

395

Quantum Coherence in Photosynthetic Light  

E-Print Network [OSTI]

the following: How do light-harvesting systems deliver such high efficiency in the presence of disordered:333­61 First published online as a Review in Advance on December 13, 2011 The Annual Review of Condensed Matter quantum efficiency of photosynthetic light harvesting. Further, this speculation has led to much effort

Fleming, Graham R.

396

Projection screen having reduced ambient light scattering  

DOE Patents [OSTI]

An apparatus and method for improving the contrast between incident projected light and ambient light reflected from a projection screen are described. The efficiency of the projection screen for reflection of the projected light remains high, while permitting the projection screen to be utilized in a brightly lighted room. Light power requirements from the projection system utilized may be reduced.

Sweatt, William C. (Albuquerque, NM)

2010-05-11T23:59:59.000Z

397

Arnold Schwarzenegger, LIGHTING RESEARCH PROGRAM  

E-Print Network [OSTI]

;#12;Prepared By: Lighting Research Center Andrew Bierman, Project Lead Troy, New York 12180 Managed ByArnold Schwarzenegger, Governor LIGHTING RESEARCH PROGRAM PROJECT 3.2 ENERGY EFFICIENT LOAD- SHEDDING LIGHTING TECHNOLOGY Prepared For: California Energy Commission Public Interest Energy Research

398

Photodetector with enhanced light absorption  

DOE Patents [OSTI]

A photodetector including a light transmissive electrically conducting layer having a textured surface with a semiconductor body thereon. This layer traps incident light thereby enhancing the absorption of light by the semiconductor body. A photodetector comprising a textured light transmissive electrically conducting layer of SnO.sub.2 and a body of hydrogenated amorphous silicon has a conversion efficiency about fifty percent greater than that of comparative cells. The invention also includes a method of fabricating the photodetector of the invention.

Kane, James (Lawrenceville, NJ)

1985-01-01T23:59:59.000Z

399

Commercial Lighting  

Broader source: Energy.gov [DOE]

Commercial lighting accounts for more than 20 percent of total commercial building energy use. The Energy Department works to reduce lighting energy use through research and deployment.

400

Detroit Public Lighting Department- Residential Energy Wise Program  

Broader source: Energy.gov [DOE]

The Detroit Public Lighting Department (PLD) offers residential customers rebates for energy efficient lights. In addition, low-income residential customers may qualify for free compact fluorescent...

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Instructions for Corning Model 220 pH Meter The electrode tip is a fragile glass bulb. Be careful or you will break it with a  

E-Print Network [OSTI]

Instructions for Corning Model 220 pH Meter The electrode tip is a fragile glass bulb. Be careful. Two Point Calibration Routine · The pH meter should be turned "ON". · Your buffers should from your sample, rinse with distilled water, and BLOT with a kimwipe. 4. Turn pH meter OFF and store

Cross, George

402

Laboratory Ventilation SafetyLaboratory Ventilation Safety J. Scott WardJ. Scott Ward  

E-Print Network [OSTI]

the incandescent light bulb in 1879.incandescent light bulb in 1879. #12;First Labconco Hood 1936First Labconco

Farritor, Shane

403

Anoka Municipal Utility- Commercial Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Anoka Municipal Utility (AMU) offers the Commercial and Industrial Lighting and Motor Rebate Program for commercial and industrial customers who install high efficiency lighting, motors, and...

404

Energy Efficiency and Conservation Block Grant Program Success...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

EECBG Success Story: Playing Around with Lighting Efficiency In the city of Brea, California, the lighting in its Brea Junior High Park was becoming obsolete. Thanks to an...

405

City of Danville Utilities- Business Energy Efficiency Rebates (Virginia)  

Broader source: Energy.gov [DOE]

The City of Danville provides a variety of energy efficiency rebates for eligible commercial and industrial customers. Rebates are awarded for lighting upgrades, lighting controls, LED exit signs,...

406

LED Lighting Facts | Department of Energy  

Energy Savers [EERE]

results according to industry standards. For lighting buyers, designers, and energy efficiency programs, the program provides information essential to evaluating SSL products....

407

Pedernales Electric Cooperative- Commercial Lighting Rebate Program  

Broader source: Energy.gov [DOE]

For existing and new commercial construction, Pedernales Electric Cooperative provides incentives for kW saved through efficient lighting. Rebates vary based upon whether construction is new or...

408

Flathead Electric Cooperative- Commercial Lighting Rebate Program  

Broader source: Energy.gov [DOE]

Flathead Electric Cooperative, in conjunction with Bonneville Power Administration, encourages energy efficiency in the commercial sector by providing a commercial lighting retro-fit rebate program...

409

Photon Statistics of Semiconductor Light Sources.  

E-Print Network [OSTI]

??In recent years, semiconductor light sources have become more and more interesting in terms of applications due to their high efficiency and low cost. Advanced… (more)

Aßmann, Marc

2010-01-01T23:59:59.000Z

410

EECBG Success Story: South Carolina Community Lights Up the Season...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Holiday Lights EECBG Success Story: South Carolina Community Lights Up the Season with Energy-Efficient Holiday Lights December 20, 2011 - 2:33pm Addthis Carolers sing in front...

411

Benton PUD- Commercial and Agricultural Energy Efficiency Rebate Programs  

Broader source: Energy.gov [DOE]

Benton PUD offers a variety of incentives to non-residential customers for energy efficiency improvements. Projects are available for commercial customers interested in energy efficient lighting...

412

City Utilities of Springfield- Commercial Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

City Utilities of Springfield offers incentives for commercial customers to increase the efficiency of eligible facilities. Rebates are available for efficient lighting upgrades, controls and for...

413

Muscatine Power and Water- Commercial and Industrial Energy Efficiency Rebates  

Broader source: Energy.gov [DOE]

Muscatine Power and Water (MP&W) offers rebates for energy efficient upgrades to commercial and industrial customers. Rebates are available for commercial lighting retrofits, energy efficient...

414

Energy Efficiency Fund (Electric)- Home Energy Solutions and Performance Programs  

Broader source: Energy.gov [DOE]

The Energy Efficiency Fund, funded by Connecticut's public benefits charge, provides home energy efficiency rebate programs to customers of The Connecticut Light and Power Company, The United...

415

Energy Efficiency Fund (Gas)- Home Energy Solutions and Performance Programs  

Broader source: Energy.gov [DOE]

The Energy Efficiency Fund, funded by Connecticut's public benefits charge, provides home energy efficiency rebate programs to customers of The Connecticut Light and Power Company and The United...

416

High efficiency and low roll-off blue phosphorescent organic...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

efficiency and low roll-off blue phosphorescent organic light-emitting devices using mixed host architecture. High efficiency and low roll-off blue phosphorescent organic...

417

Efficiency Maine Multifamily Efficiency Program  

Broader source: Energy.gov [DOE]

Efficiency Maine's Multifamily Efficiency Program offers incentives to multifamily residency building owners for improving energy efficiency. Residencies must have 5 to 20 apartment units to...

418

Vehicle Technologies Office Merit Review 2014: High Efficiency...  

Broader source: Energy.gov (indexed) [DOE]

High Efficiency Clean Combustion in Multi-Cylinder Light-Duty Engines Vehicle Technologies Office Merit Review 2014: High Efficiency Clean Combustion in Multi-Cylinder Light-Duty...

419

ENERGY EFFICIENT BUILDINGS PROGRAM. CHAPTER FROM ENERGY & ENVIRONMENT ANNUAL REPORT 1977  

E-Print Network [OSTI]

and A. H. Rosenfeld Energy Efficient Windows Program S.Verderber, and J. Klems Energy Efficient Lighting Program S.1978 A. K. OPPENHEIM Energy Efficient Buildings INTRODUCTION

Authors, Various

2010-01-01T23:59:59.000Z

420

Smart Lighting Controller!! Smart lighting!  

E-Print Network [OSTI]

1! Smart Lighting Controller!! #12;2! Smart lighting! No need to spend energy lighting the room if://blogs.stthomas.edu/realestate/2011/01/24/residential-real-estate-professionals-how-do-you- develop feedback! There is a connection between the output and the input! Therefore forces inputs to same voltage

Anderson, Betty Lise

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Lighting Market Study: Illuminating the Northwest Efficiency  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: VegetationEquipment Surfaces and Interfaces Sample6, 2011 LawrenceEfeedstocksHomes &

422

Energy Efficiency and Conservation Block Grant Program  

Broader source: Energy.gov (indexed) [DOE]

and inefficient propane stoves, refrigerators, lights, and heaters. Two efficient 12 KW diesel powered generators for batter charging, emergency use, and limited power backup...

423

Energy Efficiency and Conservation Block Grant Program  

Broader source: Energy.gov (indexed) [DOE]

Project Description: 1) Hire technical consultant to develop energy efficiency and conservation strategy, 2) retrofit boilers, lights, sensors and windows, installation of...

424

Black Hills Power- Commercial Energy Efficiency Programs  

Broader source: Energy.gov [DOE]

Black Hills Power provides rebates for its commercial customers who install energy efficient heat pumps, motors, variable frequency drives, lighting, and water heaters. Custom rebates for approved...

425

Ameren Missouri (Electric)- Business Energy Efficiency Program  

Broader source: Energy.gov [DOE]

Ameren Missouri offers cash incentives to non-residential customers for virtually any cost-effective energy efficiency project. Standard incentives are available for lighting, controls, HVAC,...

426

Veeco  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

(LEDs), has the potential to be 10 times more energy-efficient than traditional incandescent light bulbs. Currently, 20% of energy usage in the U.S. goes to lighting. SSL...

427

Lighting Renovations  

Broader source: Energy.gov [DOE]

When undertaking a lighting renovation in a Federal building, daylighting is the primary renewable energy opportunity. Photovoltaics (PV) also present an excellent opportunity. While this guide...

428

Cerenkov Light  

ScienceCinema (OSTI)

The bright blue glow from nuclear reactors is Cerenkov light. Karl Slifer describes how nuclear physicists can use this phenomenon to study the nucleus of the atom.

Slifer, Karl

2014-05-22T23:59:59.000Z

429

Cerenkov Light  

SciTech Connect (OSTI)

The bright blue glow from nuclear reactors is Cerenkov light. Karl Slifer describes how nuclear physicists can use this phenomenon to study the nucleus of the atom.

Slifer, Karl

2013-06-13T23:59:59.000Z

430

Power control architectures for cold cathode fluorescent lamp and light emitting diode based light sources.  

E-Print Network [OSTI]

?? In this dissertation, two different energy efficient power supply topologies are introduced for controlling cold cathode fluorescent lamp (CCFL) and high-brightness light emitting diode… (more)

Doshi, Montu V.

2010-01-01T23:59:59.000Z

431

Lighting Research Group FinalReportOctober1999  

E-Print Network [OSTI]

Lighting Research Group FinalReportOctober1999 Lighting Recommendations for the Social Security Administration Frank Hagel Federal Building in Richmond CA #12;Final Report Lighting Recommendations to improve the lighting quality and energy efficiency of the lighting system at the Social Security

432

The Problem Conventional office lighting typically consists of bright fluo-  

E-Print Network [OSTI]

and undercabinet lights combined with incandescent or fluorescent task lights. This approach is not very energy-friendly, high-quality light- ing with a number of benefits. Reduced waste from fluorescent lights. Fluorescent, an already-efficient lighting system can save even more energy. If an employee leaves the office and forgets

433

The Influence of Photoperiod History on Circadian Response to Light  

E-Print Network [OSTI]

broad spectrum white fluorescent bulbs (F4T5) (105 µW/cm2)broad spectrum white fluorescent bulbs (F4T5) (105 µW/cm2)broad spectrum white fluorescent bulbs (F4T5) (105 µW/cm 2 )

Glickman, Gena Lynne

434

Energy Conservation Utilizing Wireless Dimmable Lighting Control  

E-Print Network [OSTI]

results & discussion Future research #12;2 Background & Motivation Energy Usage & Potential Savings Lighting accounts for 25-30% of energy usage in building electrical systems Energy savings can be generated Energy Efficiency with Personal Lighting Preferences Light level tuning · Generates energy savings

Agogino, Alice M.

435

Nanoengineering for solid-state lighting.  

SciTech Connect (OSTI)

This report summarizes results from a 3-year Laboratory Directed Research and Development project performed in collaboration with researchers at Rensselaer Polytechnic Institute. Our collaborative effort was supported by Sandia's National Institute for Nanoengineering and focused on the study and application of nanoscience and nanoengineering concepts to improve the efficiency of semiconductor light-emitting diodes for solid-state lighting applications. The project explored LED efficiency advances with two primary thrusts: (1) the study of nanoscale InGaN materials properties, particularly nanoscale crystalline defects, and their impact on internal quantum efficiency, and (2) nanoscale engineering of dielectric and metal materials and integration with LED heterostructures for enhanced light extraction efficiency.

Schubert, E. Fred (Rensselaer Polytechnic Institute,Troy, NY); Koleske, Daniel David; Wetzel, Christian (Rensselaer Polytechnic Institute,Troy, NY); Lee, Stephen Roger; Missert, Nancy A.; Lin, Shawn-Yu (Rensselaer Polytechnic Institute,Troy, NY); Crawford, Mary Hagerott; Fischer, Arthur Joseph

2009-09-01T23:59:59.000Z

436

A world of cruelty in Titus Andronicus /  

E-Print Network [OSTI]

were the flickering fluorescent bulbs, a single scream andmade mostly for the fluorescent bulbs. Kristin Hayes, thecold light of a fluorescent bulb exposes and illuminates

Brody, Joshua Kahan

2013-01-01T23:59:59.000Z

437

DSM Electricity Savings Potential in the Buildings Sector in APP Countries  

E-Print Network [OSTI]

150 million compact fluorescent light bulbs in 2010. (ChinaCleaners Incandescent Bulbs Fluorescent Lamps Ballasts forincandescent bulbs with compact fluorescent lamps. Consumers

McNeil, MIchael

2011-01-01T23:59:59.000Z

438

Behavioral Perspectives on Home Energy Audits: The Role of Auditors, Labels, Reports, and Audit Tools on Homeowner Decision Making  

E-Print Network [OSTI]

and  dishwasher,  all  fluorescent  bulbs   Changed  about  on.   I  use  more  fluorescent  bulbs  now.   Increased  Furnace   Installed  fluorescent  light  bulbs   Insulate  

Ingle, Aaron

2013-01-01T23:59:59.000Z

439

Efficient defrosting of an inclined flat surface Subrata Roy *, Haribalan Kumar, Richard Anderson  

E-Print Network [OSTI]

and compared results with thermography and hot bulb type of measurements [12]. However, a correlation

Roy, Subrata

440

Energy Efficiency and Energy Policy  

E-Print Network [OSTI]

Energy Efficiency and Energy Policy David E. Claridge, Director Energy Systems Laboratory November 19, 2014 ESL-KT-14-11-17 CATEE 2014: Clean Air Through Efficiency Conference, Dallas, Texas Nov. 18-20 50 Years of Automobile Improvements ? 1960s...: Clean Air Through Efficiency Conference, Dallas, Texas Nov. 18-20 Impact of Auto/Truck Efficiency Increases ? Autos/light trucks used energy = Energy Imports in 2012 ? AUTO/TRUCK EFFICIENCY IMPROVEMENTS have CUT U.S. ENERGY IMPORTS IN HALF ESL...

Claridge, D.

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

LIFE CYCLE SUSTAINABILITY ASSESSMENT An agent based approach to the potential for rebound resulting  

E-Print Network [OSTI]

efficient lighting options, such as com- pact fluorescent bulbs and light emitting diodes are predicted . Light emitting diode . Lighting . Rebound effect . Residential consumption 1 Introduction Light (US EIA 2011). Light emitting diode (LED) lamps1 represent an evolution in how residential 1 Light

Illinois at Chicago, University of

442

Catalog of DC Appliances and Power Systems  

E-Print Network [OSTI]

loss for the compact fluorescent bulb replacement. For mosta light bulb or tube, a compact fluorescent lamp typically

Garbesi, Karina

2012-01-01T23:59:59.000Z

443

OLEDS FOR GENERAL LIGHTING  

SciTech Connect (OSTI)

The goal of this program was to reduce the long term technical risks that were keeping the lighting industry from embracing and developing organic light-emitting diode (OLED) technology for general illumination. The specific goal was to develop OLEDs for lighting to the point where it was possible to demonstrate a large area white light panel with brightness and light quality comparable to a fluorescence source and with an efficacy comparable to that of an incandescent source. it was recognized that achieving this would require significant advances in three area: (1) the improvement of white light quality for illumination, (2) the improvement of OLED energy efficiency at high brightness, and (3) the development of cost-effective large area fabrication techniques. The program was organized such that, each year, a ''deliverable'' device would be fabricated which demonstrated progress in one or more of the three critical research areas. In the first year (2001), effort concentrated on developing an OLED capable of generating high illumination-quality white light. Ultimately, a down-conversion method where a blue OLED was coupled with various down-conversion layers was chosen. Various color and scattering models were developed to aid in material development and device optimization. The first year utilized this approach to deliver a 1 inch x 1 inch OLED with higher illumination-quality than available fluorescent sources. A picture of this device is shown and performance metrics are listed. To their knowledge, this was the first demonstration of true illumination-quality light from an OLED. During the second year, effort concentrated on developing a scalable approach to large area devices. A novel device architecture consisting of dividing the device area into smaller elements that are monolithically connected in series was developed. In the course of this development, it was realized that, in addition to being scalable, this approach made the device tolerant to the most common OLED defect--electrical shorts. This architecture enabled the fabrication of a 6 inch x 6 inch OLED deliverable for 2002. A picture of this deliverable is shown and the performance metrics are listed. At the time, this was the highest efficiency, highest lumen output illumination-quality OLED in existence. The third year effort concentrated on improving the fabrication yield of the 6 inch x 6 inch devices and improving the underlying blue device efficiency. An efficiency breakthrough was achieved through the invention of a new device structure such that now 15 lumen per watt devices could be fabricated. A 2 feet x 2 feet OLED panel consisting of sixteen 6 inch x 6 inch high efficiency devices tiled together was then fabricated. Pictures of this panel are shown with performance metrics listed. This panel met all project objectives and was the final deliverable for the project. It is now the highest efficiency, highest lumen output, illumination-quality OLED in existence.

Anil Duggal; Don Foust; Chris Heller; Bill Nealon; Larry Turner; Joe Shiang; Nick Baynes; Tim Butler; Nalin Patel

2004-02-29T23:59:59.000Z

444

Hybrid Solar Lighting Provides Energy Savings and Reduces Waste Heat  

SciTech Connect (OSTI)

ABSTRACT Artificial lighting is the largest component of electricity use in commercial U.S. buildings. Hybrid solar lighting (HSL) provides an exciting new means of reducing energy consumption while also delivering significant ancillary benefits associated with natural lighting in buildings. As more than half of all federal facilities are in the Sunbelt region (defined as having an average direct solar radiation of greater than 4 kWh/m2/day) and as more than half of all square footage available in federal buildings is also in the Sunbelt, HSL is an excellent technology fit for federal facilities. The HSL technology uses a rooftop, 4-ft-wide dish and secondary mirror that track the sun throughout the day (Fig. 1). The collector system focuses the sunlight onto 127 optical fibers. The fibers serve as flexible light pipes and are connected to hybrid light fixtures that have special diffusion rods that spread out the light in all directions. One collector powers about eight hybrid light fixtures-which can illuminate about 1,000 square feet. The system tracks at 0.1 accuracy, required by the two-mirror geometry to keep the focused beam on the fiber bundle. When sunlight is plentiful, the optical fibers in the luminaires provide all or most of the light needed in an area. During times of little or no sunlight, a sensor controls the intensity of the artificial lamps to maintain a desired illumination level. Unlike conventional electric lamps, the natural light produces little to no waste heat and is cool to the touch. This is because the system's solar collector removes the infrared light-the part of the spectrum that generates a lot of the heat in conventional bulbs-from the sunlight.

Lapsa, Melissa Voss [ORNL; Maxey, L Curt [ORNL; Earl, Dennis Duncan [ORNL; Beshears, David L [ORNL; Ward, Christina D [ORNL; Parks, James Edgar [ORNL

2006-01-01T23:59:59.000Z

445

E-Print Network 3.0 - anomalous light absorption Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

, communications and computers) Orderly traffic flow in networks. Increase the efficiency Solar Light System... the group velocities of light in a medium and more research needs to...

446

FirstEnergy (Potomac Edison)- Municipal and Street Lighting Program (Maryland)  

Broader source: Energy.gov [DOE]

FirstEnergy offers several incentives for non-residential and municipal customers to upgrade traffic signals, pedestrian signals, street lights to more efficient fixtures. The Municipal Lighting...

447

Integrated LED-based luminare for general lighting  

DOE Patents [OSTI]

Lighting apparatus and methods employing LED light sources are described. The LED light sources are integrated with other components in the form of a luminaire or other general purpose lighting structure. Some of the lighting structures are formed as Parabolic Aluminum Reflector (PAR) luminaires, allowing them to be inserted into conventional sockets. The lighting structures display beneficial operating characteristics, such as efficient operation, high thermal dissipation, high output, and good color mixing.

Dowling, Kevin J.; Lys, Ihor A.; Roberge, Brian; Williamson, Ryan C.; Roberts, Ron; Datta, Michael; Mollnow, Tomas; Morgan, Frederick M.

2013-03-05T23:59:59.000Z

448

U.S. Department of Energy Office of Energy Efficiency and Renewable...  

Broader source: Energy.gov (indexed) [DOE]

proposes to retrofit streetlights on the Dakota Parkway with energy efficient light-emitting diode lighting fixtures. Conditions: None Categorical Exclusion(s) Applied: B1.32,...

449

EXTERIOR LIGHTING CASE STUDY CALIFORNIA LIGHTING TECHNOLOGY CENTER, UC DAVIS PHONE: (530) 747-3838 FAX: (530) 747-3812 CLTC.UCDAVIS.EDU  

E-Print Network [OSTI]

. This energy waste can easily be averted by implementing energy-efficient light sources and lighting controls.S. health care facilities to install an energy-efficient, ultra-smart outdoor LED lighting system. The award schedules, light levels and time-out settings, monitor the system's energy use, and receive automated alerts

California at Davis, University of

450

Controls for Solid-State Lighting  

SciTech Connect (OSTI)

This study predicts new hybrid lighting applications for LEDs. In hybrid lighting, LEDs provide a low-energy 'standby' light level while another, more powerful, efficient light source provides light for occupied periods. Lighting controls will allow the two light sources to work together through an appropriate control strategy, typically motion-sensing. There are no technical barriers preventing the use of low through high CRI LEDs for standby lighting in many interior and exterior applications today. The total luminous efficacy of LED systems could be raised by increasing the electrical efficiency of LED drivers to the maximum practically achievable level (94%). This would increase system luminous efficacy by 20-25%. The expected market volumes for many types of LEDs should justify the evolution of new LED drivers that use highly efficient ICs and reduce parts count by means of ASICs. Reducing their electronics parts count by offloading discrete components onto integrated circuits (IC) will allow manufacturers to reduce the cost of LED driver electronics. LED luminaire manufacturers will increasingly integrate the LED driver and thermal management directly in the LED fixture. LED luminaires of the future will likely have no need for separable lamp and ballast because the equipment life of all the LED luminaire components will all be about the same (50,000 hours). The controls and communications techniques used for communicating with conventional light sources, such as dimmable fluorescent lighting, are appropriate for LED illumination for energy management purposes. DALI has been used to control LED systems in new applications and the emerging ZigBee protocol could be used for LEDs as well. Major lighting companies are already moving in this direction. The most significant finding is that there is a significant opportunity to use LEDs today for standby lighting purposes. Conventional lighting systems can be made more efficient still by using LEDs to provide a low-energy standby state when lower light levels are acceptable.

Rubinstein, Francis

2007-06-22T23:59:59.000Z

451

ENERGY EFFICIENT LIGHTING PRODUCTS NOTICE (2011-04-25) i ENERGY EFFICIENT LIGHTING PRODUCTS  

E-Print Network [OSTI]

Measurements ______ 22/E12* IES LM-45:1991 Incandescent Lamps - Electrical Measurements ______ 22/E13* IES LM-45:2000 Incandescent Lamps - Electrical Measurements ______ 22/E13a* IES LM-45:2009 Incandescent

452

Researchers Say They've Solved the Mystery of LED Lighting "Droop...  

Broader source: Energy.gov (indexed) [DOE]

Sciences Team. Despite being cool, ultra-efficient and long lasting, the light-emitting diode (LED) faces a problem called "efficiency droop." New findings from simulations...

453

Light Computing  

E-Print Network [OSTI]

A configuration of light pulses is generated, together with emitters and receptors, that allows computing. The computing is extraordinarily high in number of flops per second, exceeding the capability of a quantum computer for a given size and coherence region. The emitters and receptors are based on the quantum diode, which can emit and detect individual photons with high accuracy.

Gordon Chalmers

2006-10-13T23:59:59.000Z

454

Advanced Lighting Program Development (BG9702800) Final Report  

SciTech Connect (OSTI)

The report presents a long-range plan for a broad-based, coordinated research, development and market transformation program for reducing the lighting energy intensities in commercial and residential buildings in California without compromising lighting quality. An effective program to advance lighting energy efficiency in California must be based on an understanding that lighting is a mature field and the lighting industry has developed many specialized products that meet a wide variety of light needs for different building types. Above all else, the lighting field is diverse and there are applications for a wide range of lighting products, systems, and strategies. Given the range of existing lighting solutions, an effective energy efficient lighting research portfolio must be broad-based and diverse to match the diversity of the lighting market itself. The belief that there is one solution--a magic bullet, such as a better lamp, for example--that will propel lighting efficiency across all uses to new heights is, in the authors' opinion, an illusion. A multi-path program is the only effective means to raising lighting efficiency across all lighting applications in all building types. This report presents a list of 27 lighting technologies and concepts (key activities) that could form the basis of a coordinated research and market transformation plan for significantly reducing lighting energy intensities in California buildings. The total 27 key activities into seven broad classes as follows: Light sources; Ballasts; Luminaires; Lighting Controls; Lighting Systems in Buildings; Human Factors and Education. Each of the above technology classes is discussed in terms of background, key activities, and the energy savings potential for the state. The report concludes that there are many possibilities for targeted research, development, and market transformation activities across all sectors of the building lighting industry. A concerted investment by the state to foster efficiency improvements in lighting systems in commercial and residential buildings would have a major positive impact on energy use and environmental quality in California.

Rubinstein, Francis; Johnson, Steve

1998-02-01T23:59:59.000Z

455

Image Recognition System for Automated Lighting Retrofit Assessment  

E-Print Network [OSTI]

, and K. Baugh, ?Spectral Identification of Lighting Type and Character,? Sensors, vol. 10, pp. 3961-3988, 2010. (3) L. Halonen, E. Tetri, and P. Bhusal, ?Guidebook on Energy Efficient Electric Lighting for Buildings,? Espoo, Finland: Dept. Elect. Eng...

Venable, K.; Bhatia, D.; Coverick, R.; Gutierrez, C.; Knight, J.; McGarry, D.; McGee, K.; Smith, Z.; Terrill, T. J.; Vanderford, B.; Weiser, R.; Wightman, K.; Rasmussen, B. P.

2013-01-01T23:59:59.000Z

456

How Do You Save on Lighting Costs? | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

LED lights are six to seven times more energy efficient than conventional incandescent lights, cut energy use by more than 80 percent and can last more than 25 times...

457

Energy-Efficient Computing and its Resource  

E-Print Network [OSTI]

Energy-Efficient Computing and its Resource Implications Fred Chong Director, Greenscale Center for Energy-Efficient Computing Director, Computer Engineering UC Santa Barbara #12;Skyrocketing Energy Servers [Barosso and Hoetzle, Computer 2007] #12;Energy-Efficiency at Light Load [Barosso and Hoetzle

Keller, Arturo A.

458

Synergies Connecting the Photovoltaics and Solid-State Lighting Industries  

SciTech Connect (OSTI)

Recent increases in the efficiencies of phosphide, nitride, and organic light-emitting diodes (LEDs) inspire a vision of a revolution in lighting. If high efficiencies, long lifetimes, and low cost can be achieved, solid-state lighting could save our country many quads of electricity in the coming years. The solid-state lighting (SSL) and photovoltaic (PV) industries share many of the same challenges. This paper explores the similarities between the two industries and how they might benefit by sharing information.

Kurtz, S.

2003-05-01T23:59:59.000Z

459

Lighting market sourcebook for the US  

SciTech Connect (OSTI)

Throughout the United States, in every sector and building type, lighting is a significant electrical end-use. Based on the many and varied studies of lighting technologies, and experience with programs that promote lighting energy-efficiency, there is a significant amount of cost-effective energy savings to be achieved in the lighting end use. Because of such potential savings, and because consumers most often do not adopt cost-effective lighting technologies on their own, programs and policies are needed to promote their adoption. Characteristics of lighting energy use, as well as the attributes of the lighting marketplace, can significantly affect the national pattern of lighting equipment choice and ownership. Consequently, policy makers who wish to promote energy-efficient lighting technologies and practices must understand the lighting technologies that people use, the ways in which they use them, and marketplace characteristics such as key actors, product mix and availability, price spectrum, and product distribution channels. The purpose of this report is to provide policy-makers with a sourcebook that addresses patterns of lighting energy use as well as data characterizing the marketplace in which lighting technologies are distributed, promoted, and sold.

Vorsatz, D.; Shown, L.; Koomey, J.; Moezzi, M.; Denver, A.; Atkinson, B.

1997-12-01T23:59:59.000Z

460

Seattle City Light- Vending Machine Rebate Program  

Broader source: Energy.gov [DOE]

Seattle City Light offers qualifying customers $80 rebates for the purchase of VendingMiser Energy Efficient Vending Machines. VendingMiser reduces the energy consumption of cold drink vending...

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Edmund G. Brown Jr. LIGHTING CALIFORNIA'S FUTURE  

E-Print Network [OSTI]

Area Lead PIER Buildings End-Use Energy Efficiency Virginia Lew Office Manager ENERGY IN RESIDENTIAL FANS PIERFINALPROJECTREPORT Prepared For: California Energy Commission Public Interest Energy Research Program Managed By: Architectural Energy Corporation Prepared By: California Lighting Technology

462

Cost effective lighting  

SciTech Connect (OSTI)

Long-life replacement lamps for the incandescent lamp have been evaluated with regard to their cost effectiveness. The replacements include the use of energy buttons that extend lamp life as well as an adaptive fluorescent circline lamp that will fit into existing incandescent lamp sockets. The initial, operating, and replacement costs for one million lumen-hours are determined for each lamp system. We find the most important lighting cost component is the operating cost. Using lamps that are less efficient or devices that cause lamps to operate less efficiently are not cost-effective. The adaptive fluorescent circline lamp, even at an initial cost of $15.00, is the most cost effective source of illumination compared to the incandescent lamp and lamp systems examined. 3 refs., 6 tabs.

Morse, O.; Verderber, R.

1987-07-01T23:59:59.000Z

463

Department of Energy Opens Investigation into Alleged Lighting...  

Office of Environmental Management (EM)

Opens Appliance Standards Investigation for Certain Air Con International Air Conditioners and Heat Pumps DOE Closes Investigation into Alleged Lighting Efficiency Violations...

464

Testimonials - Partnerships in Solid-State Lighting - Cree, Inc...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Cree, Inc. Testimonials - Partnerships in Solid-State Lighting - Cree, Inc. Addthis Text Version The words "Office of Energy Efficiency & Renewable Energy, U.S. Department of...

465

Seattle City Light- Built Smart Program for Builders and Architects  

Broader source: Energy.gov [DOE]

Seattle City Light provides incentives for builders, developers, and architects who construct energy efficient multi-family buildings. The program is designed to encourage the construction of...

466

Detroit Public Lighting Department- Commercial and Industrial Energy Wise Program  

Broader source: Energy.gov [DOE]

The Detroit Public Lighting Department (PLD) offers commercial and industrial customers rebates for energy efficient equipment. Specific rebate amounts, equipment requirements, and applications are...

467

Portable lamp with dynamically controlled lighting distribution  

DOE Patents [OSTI]

A double lamp table or floor lamp lighting system has a pair of compact fluorescent lamps (CFLs) arranged vertically with a reflective septum in between. By selectively turning on one or both of the CFLs, down lighting, up lighting, or both up and down lighting is produced. The control system can also vary the light intensity from each CFL. The reflective septum insures that almost all the light produced by each lamp will be directed into the desired light distribution pattern which is selected and easily changed by the user. Planar compact fluorescent lamps, e.g. circular CFLs, particularly oriented horizontally, are preferable. CFLs provide energy efficiency. The lighting system may be designed for the home, hospitality, office or other environments.

Siminovitch, Michael J. (Pinole, CA); Page, Erik R. (Berkeley, CA)

2001-01-01T23:59:59.000Z

468

An Analysis of Efficiency Improvements in Residential Sized Heat Pumps, Final Report, May 1986  

E-Print Network [OSTI]

EQUIPMENT MANUFACTURERS ORNL OAK RIDGE NATIONAL LABORATORY PLF PART LOAD FACTOR SAI SCIENCE APPLICATION INCORPORATED SEER SEASONAL ENERGY EFFICIENCY RATIO SF SQUARE FEET SHF SENSIBLE HEATING FACTOR TDB DRY BULB TEMPERATURE TON 12000 BTU/HR TXV THERMAL... Systems 6-13 5 Ton Package Systems 6-22 References 6-22 CONCLUSIONS AND RECOMMENDATIONS 7-1 iii APPENDIX * PAGE A ORNL MODEL OUTPUT A-1 B SEASONAL PERFORMANCE MODEL DESCRIPTION B-1 C OPTIMIZATION PROCEDURE C-1 iv CHAPTER 1 INTRODUCTION The National Energy...

O'Neal, D. L.; Murphy, W. E.

1985-01-01T23:59:59.000Z

469

High-Efficiency Solar Cogeneration with TPV & Fiber-Optic Daylighting...  

Broader source: Energy.gov (indexed) [DOE]

High-Efficiency Solar Cogeneration with TPV & Fiber-Optic Daylighting High-Efficiency Solar Cogeneration with TPV & Fiber-Optic Daylighting Lead Performer: Creative Light Source,...

470

U.S. Department of Energy Office of Energy Efficiency and Renewable...  

Broader source: Energy.gov (indexed) [DOE]

incandescent traffic signal heads and pedestrian displays to energy efficient light-emitting diode displays; and 3) improve traffic signal system operations and efficiency by...

471

E-Print Network 3.0 - alters high light Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

One of the key... Light Communication What is the problem? The white light-emitting diode (LED) stands at the threshold... of a new era of energy-efficient lighting...

472

Energy Saving and Good Quality Lighting for Indoor Applications  

E-Print Network [OSTI]

with extremely high lamp efficacies, silver-coated aluminum lamellae optics for high luminares efficiency, as well as highly efficient electronic gear take care that the energy consumption is decreasing up to 40%, while the light quality is improving. Latest...

Lange, H.

2008-01-01T23:59:59.000Z

473

Lighting Inventory Lighting Theatre and Drama  

E-Print Network [OSTI]

Lighting Inventory Lighting Theatre and Drama Description Totals R.Halls Wells- Metz Light ERS ETC SourceFour 25 25 50 degree ERS Strand Lighting 64 14 24 12 14 36 degree ERS ETC Source Four 15 15 36 degree ERS Strand Lighting 124 60 58 2 4 26 degree ERS ETC SourceFour 2 2 26 degree ERS Strand

Indiana University

474

CX-006337: Categorical Exclusion Determination | Department of...  

Broader source: Energy.gov (indexed) [DOE]

the Police Station with a more energy efficient boiler, and 6) implementation of an incandescent light-bulb trade-in program for low-income households. DOCUMENT(S) AVAILABLE FOR...

475

DOE/LX/07-0087&D1 Secondary Document DMSA C-333-41 Solid Waste...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

included welding rods, solder, a Nissen metal marker, fluorescent light starters, incandescent light bulbs and ends, fluorescent light bulb ends, miscellaneous lead pieces, and...

476

DOE/LX/07-0323&D1 Secondary Document DMSA C-333-15 and DMSA C...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

waste formerly stored consisted of a fuse, circuit boards, light bulbs, broken incandescent light bulbs, a light starter, and a container of hand table sludge. The Toxic...

477

Light-shift modulated photon-echo  

E-Print Network [OSTI]

We show that the AC-Stark shift (light-shift) is a powerful and versatile tool to control the emission of a photon-echo in the context of optical storage. As a proof-of-principle, we demonstrate that the photon-echo efficiency can be fully modulated by applying light-shift control pulses in an erbium doped solid. The control of the echo emission is attributed to the spatial gradient induced by the light-shift beam.

Chaneličre, Thierry

2015-01-01T23:59:59.000Z

478

Light-shift modulated photon-echo  

E-Print Network [OSTI]

We show that the AC-Stark shift (light-shift) is a powerful and versatile tool to control the emission of a photon-echo in the context of optical storage. As a proof-of-principle, we demonstrate that the photon-echo efficiency can be fully modulated by applying light-shift control pulses in an erbium doped solid. The control of the echo emission is attributed to the spatial gradient induced by the light-shift beam.

Thierry Chaneličre; Gabriel Hétet

2015-02-24T23:59:59.000Z

479

Light Source  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: VegetationEquipment Surfaces and Interfaces Sample6, 2011 LawrenceEfeedstocks and the climateLife a Light

480

Light' Darkness  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth7-1D: VegetationEquipment Surfaces and Interfaces Sample6, 2011 LawrenceEfeedstocks and the climateLifeLight to

Note: This page contains sample records for the topic "light bulb efficiency" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Light Water Reactor Sustainability  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

3 Light Water Reactor Sustainability Program ACCOMPLISHMENTS REPORT 2013 Accomplishments Report | Light Water Reactor Sustainability 2 T he mission of the Light Water Reactor...

482

Light Water Reactor Sustainability  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

4 Light Water Reactor Sustainability ACCOMPLISHMENTS REPORT 2014 Accomplishments Report | Light Water Reactor Sustainability 2 T he mission of the Light Water Reactor...

483

1-Dodecane-sulfonic-acid-sodium-salt(LAS) assisted hydrothermal synthesis of Cd{sub x}Zn{sub 1-x}S solid solution as efficient photocatalysts under visible light irradiation  

SciTech Connect (OSTI)

With anionic surfactant LAS assisted, series of zinc cadmium sulfide semiconductor photocatalysts were synthesized by hydrothermal method. These products were characterized by X-ray diffraction (XRD), UV-Vis absorption spectra (UV-Vis) and scanning electron microscopy (FESEM). The photocatalytic activities of as-prepared samples were evaluated by photocatalytic hydrogen production from water under visible-light irradiation. The best synthesis parameters are: Composition 0.9:0.1 (Cd:Zn molar ratio), Temperature 160 deg. C, Hydrothermal Time 48 Hour, LAS Concentration 1.7 mmol/L, the maximum visible-light-catalytic hydrogen production rate is 161.25 {mu}mol/h (lambda>430 nm) which is higher than those of by coprecipitation method. The experiment results indicate that surfactant assisted hydrothermal method is an effective way to get highly active CdZnS solid solution photocatalyst.

Jia, B.; Guo, L. J. [State Key Laboratory of Multiphase Flow in power Engineering, Xi'an Jiaotong University (China)

2010-03-01T23:59:59.000Z

484

Piedmont EMC- Residential Energy Efficient Heat Pump Rebate Program  

Broader source: Energy.gov [DOE]

Piedmont Electric Membership Corporation (PEMC) offers a financial incentive for residential members to install energy efficient heat pumps and compact fluorescent lighting in eligible homes....

485

Omaha Public Power District- Commercial Energy Efficiency Rebate Programs  

Broader source: Energy.gov [DOE]

Omaha Public Power District (OPPD) offers incentives for commercial and industrial customers to install energy-efficient heat pumps and replace/retrofit existing lighting systems. The Commercial...

486

Nebraska Public Power District- Commercial Energy Efficiency Rebate Programs  

Broader source: Energy.gov [DOE]

Nebraska Public Power District offers multiple rebates for commercial and industrial customers to save energy in eligible facilities. Rebates are available for energy efficient lighting, HVAC...

487

Lassen Municipal Utility District- Residential Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Lassen Municipal Utility District (LMUD) offers an incentive for residential customers who purchase and install efficient lighting, HVAC equipment and ENERGY STAR rated appliances for eligible...

488

River Falls Municipal Utilities- Business Energy Efficiency Rebate Program (Wisconsin)  

Broader source: Energy.gov [DOE]

River Falls Municipal Utility (RFMU) offers a variety of rebates to business customers for implementing energy efficient equipment upgrades. Rebates are available for commercial lighting, central...

489

Montana-Dakota Utilities- Commercial Energy Efficiency Incentive Program  

Broader source: Energy.gov [DOE]

Montana-Dakota Utilities (MDU) offers a variety of rebates to commercial customers for the purchase and installation of energy efficient lighting measures, air conditioning equipment, variable...

490

City of Lompoc Utilities- Commercial Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

City of Lompoc Utilities offers rebates to commercial customers for the purchase and installation of energy efficiency lighting, clothes washers, dishwashers, replaced refrigerators, new...

491

Empire Electric Association- Residential Energy Efficiency Credit Program  

Broader source: Energy.gov [DOE]

Empire Electric Association provides rebates for its commercial customers who upgrade to energy efficient lighting, HVAC equipment, and motors.  These rebates are offered in conjunction with [http:...

492

Xcel Energy (Gas and Electric)- Residential Energy Efficiency Rebate Programs  

Broader source: Energy.gov [DOE]

In addition to home energy audits, Xcel Energy offers rebates to Minnesota residential customers for the purchase of energy efficient HVAC systems, insulation, appliances and lighting equipment....

493

Riverland Energy Cooperative- Commercial and Industrial Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Riverland Energy Cooperative offers a number of rebates for the purchase and installation of efficient lighting fixtures, air conditioners, heat pumps, water heaters, central electric thermal...

494

The Uniform Methods Project: Methods for Determining Energy Efficiency...  

Office of Environmental Management (EM)

for Determining Energy Efficiency Savings for Specific Measures: January 2012 - March 2013 Acknowledgements Chapter 1: Introduction Chapter 2: Commercial and Industrial Lighting...

495

The Uniform Methods Project: Methods For Determining Energy Efficiency...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

for Determining Energy Efficiency Savings for Specific Measures: January 2012 - March 2013 Acknowledgements Chapter 1: Introduction Chapter 2: Commercial and Industrial Lighting...

496

Empire District Electric- Commercial and Industrial Efficiency Rebates  

Broader source: Energy.gov [DOE]

Empire District Electric Company offers rebates to certain commercial and industrial customers for the installation of energy efficiency equipment. Prescriptive rebates for lighting, air...

497

Xcel Energy (Electric)- Business Energy Efficiency Rebate Programs  

Broader source: Energy.gov [DOE]

Xcel Energy offers rebate programs for Colorado commercial and industrial customers for a wide range of energy efficiency technologies including heating and cooling, motors, lighting, and...

498

Marshall Municipal Utilities- Commercial Energy Efficiency Rebate Program  

Broader source: Energy.gov [DOE]

Marshall Municipal Utilities offers incentives to commercial customers which help cover the installation costs of energy efficient lighting, heating and cooling equipment, motors, variable...

499

Puget Sound Energy- Commercial Energy Efficient Equipment Rebate Programs  

Broader source: Energy.gov [DOE]

Puget Sound Energy's (PSE) Energy Efficient Equipment Rebate Programs offer a variety of incentives to non-residential customers. Eligible technologies include lighting measures, air conditioners,...

500

Evaluation of High Efficiency Clean Combustion (HECC) Strategies...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Combustion (HECC) Strategies for Meeting Future Emissions Regulations in Light-Duty Engines Evaluation of High Efficiency Clean Combustion (HECC) Strategies for Meeting Future...